A.I. Explanation:

Correct answer: commonly

Explanation: The word 'commonly' fits grammatically as it serves as an adverb modifying 'known,' indicating that the polygraph is widely recognized as a lie detector. This aligns with the context of the sentence, which discusses the general perception of the device.

Meaning: 'Commonly' means 'usually' or 'frequently,' suggesting that the term lie detector is a widely accepted name for the polygraph.

Wrong options:

• largely: 'Largely' implies a significant extent but does not convey the idea of frequency or common usage, making it contextually inappropriate here.
• likely: 'Likely' suggests a probability but does not fit grammatically as it does not modify 'known' in the same way as an adverb would.
• probably: 'Probably' indicates a likelihood but lacks the sense of common usage that 'commonly' provides, making it less suitable in this context.

Correct answer: pressure

Explanation: The term 'pressure' is the correct noun that fits the context of physical reactions being recorded by the polygraph. It is a specific physiological measurement relevant to the test, aligning with the grammatical structure of the sentence.

Meaning: 'Pressure' refers to the force exerted by blood against the walls of blood vessels, a key indicator in lie detection tests.

Wrong options:

• level: 'Level' is too vague and does not specifically refer to a measurable physiological response like blood pressure does.
• group: 'Group' does not relate to any physiological measurement and is irrelevant in this context.
• mass: 'Mass' refers to the amount of matter in an object and does not apply to the physiological context of the polygraph.

Correct answer: resulting

Explanation: The word 'resulting' correctly describes the data that comes from the control questions, fitting grammatically as it modifies 'data' and aligns with the context of comparing outcomes from the test.

Meaning: 'Resulting' means 'arising as a consequence,' indicating that the data is a direct outcome of the control questions.

Wrong options:

• ending: 'Ending' implies a conclusion or termination, which does not fit the context of data being produced from the test.
• deriving: 'Deriving' suggests obtaining something from a source but does not fit grammatically as a descriptor for data in this context.
• emerging: 'Emerging' implies coming into view but does not accurately describe the nature of the data in relation to the control questions.

Correct answer: investigation

Explanation: The term 'investigation' is the most appropriate noun that fits the context of the questions being asked during the polygraph test. It aligns grammatically and contextually with the idea of a formal inquiry.

Meaning: 'Investigation' refers to a systematic examination or inquiry, which is what the polygraph test aims to achieve.

Wrong options:

• survey: 'Survey' implies a broader assessment and does not specifically relate to the focused questioning in a lie detection context.
• observation: 'Observation' refers to the act of watching but does not capture the investigative nature of the questioning process.
• search: 'Search' implies looking for something but lacks the formal inquiry aspect that 'investigation' conveys.

Correct answer: conclusions

Explanation: The word 'conclusions' fits grammatically as a noun that refers to the final judgments drawn from the test results. It aligns with the context of the sentence, which discusses the outcomes of the polygraph test.

Meaning: 'Conclusions' are the final decisions or judgments made after considering the evidence from the test.

Wrong options:

• answers: 'Answers' implies responses to questions but does not convey the finality or judgment aspect that 'conclusions' does.
• suggestions: 'Suggestions' imply recommendations rather than definitive outcomes, making it less suitable in this context.
• results: 'Results' refer to the outcomes of the test but do not imply the interpretative aspect that 'conclusions' provides.