A.I. Explanation:

Correct answer: had become

Explanation: The phrase 'had become' is in the past perfect tense, which is appropriate here as it indicates a change that occurred before another past event (the realization in the 1990s). This fits grammatically and contextually, as it describes the population's state at that time.

Meaning: 'Had become' indicates a change that was completed before another past action.

Wrong options:

• proved: 'Proved' is the past tense of 'prove' and does not fit the context of describing a state of being.
• was: 'Was' is a simple past tense verb that does not convey the sense of change over time as 'had become' does.
• caused: 'Caused' is a past tense verb that implies an action rather than a state of being, which does not fit here.
• reflected: 'Reflected' is also a past tense verb that suggests mirroring rather than describing a change in state.
• decided: 'Decided' is a past tense verb that indicates an action taken, which does not fit the context of describing the population's state.
• performed: 'Performed' is a past tense verb that implies an action, which does not relate to the state of the population.
• turned: 'Turned' is a past tense verb that suggests a change but does not fit the context of describing the population's state.

Correct answer: decided

Explanation: The word 'decided' is in the simple past tense, which is appropriate here as it indicates a choice made by the media professionals in the past. This fits grammatically and contextually, as it describes their action in response to the changing population.

Meaning: 'Decided' means to make a choice or come to a resolution about something.

Wrong options:

• proved: 'Proved' does not fit as it implies demonstrating something rather than making a decision.
• was: 'Was' is a simple past tense verb that does not convey the action of making a decision.
• caused: 'Caused' implies an action that leads to an effect, which does not fit the context of making a decision.
• turned: 'Turned' suggests a change rather than a decision, which does not fit here.
• reflected: 'Reflected' implies mirroring rather than making a choice, which is not applicable in this context.
• performed: 'Performed' suggests carrying out an action, which does not relate to the decision-making process.
• decided: This is the correct answer.

Correct answer: turned

Explanation: The word 'turned' is in the simple past tense and indicates a change in terminology that occurred in the past. This fits grammatically and contextually, as it describes how the word 'Christmas' was altered to be more inclusive.

Meaning: 'Turned' means to change or transform something into another form.

Wrong options:

• proved: 'Proved' does not fit as it implies demonstrating something rather than changing a term.
• was: 'Was' is a simple past tense verb that does not convey the action of changing a word.
• caused: 'Caused' implies an action that leads to an effect, which does not fit the context of changing terminology.
• decided: 'Decided' suggests a choice rather than a change in terminology, which is not applicable here.
• reflected: 'Reflected' implies mirroring rather than changing a term, which does not fit.
• performed: 'Performed' suggests carrying out an action, which does not relate to changing a word.

Correct answer: caused

Explanation: The word 'caused' is in the simple past tense and indicates an action that may have led to a result. This fits grammatically and contextually, as it questions whether the change in language had an effect on social attitudes.

Meaning: 'Caused' means to bring about or result in something.

Wrong options:

• proved: 'Proved' does not fit as it implies demonstrating something rather than indicating a cause.
• was: 'Was' is a simple past tense verb that does not convey the action of causing an effect.
• turned: 'Turned' suggests a change rather than a causal relationship, which does not fit here.
• decided: 'Decided' implies a choice rather than a cause, which is not applicable in this context.
• reflected: 'Reflected' implies mirroring rather than indicating a cause, which does not fit.
• performed: 'Performed' suggests carrying out an action, which does not relate to causing a change.

Correct answer: reflected

Explanation: The word 'reflected' is in the simple past tense and indicates an action that shows or demonstrates something. This fits grammatically and contextually, as it suggests that the change in language was indicative of pre-existing attitudes.

Meaning: 'Reflected' means to show or demonstrate something, often as a result of a prior state.

Wrong options:

• proved: 'Proved' does not fit as it implies demonstrating something rather than indicating a reflection of attitudes.
• was: 'Was' is a simple past tense verb that does not convey the action of reflecting attitudes.
• caused: 'Caused' implies an action that leads to an effect, which does not fit the context of showing existing attitudes.
• turned: 'Turned' suggests a change rather than indicating a reflection of attitudes, which does not fit here.
• decided: 'Decided' implies a choice rather than reflecting existing attitudes, which is not applicable in this context.
• performed: 'Performed' suggests carrying out an action, which does not relate to reflecting attitudes.