A.I. Explanation:

Correct answer: divided

Explanation: The word 'divided' fits grammatically as it is the past participle form used to indicate the action of separating human history into distinct eras. It aligns contextually with the idea of categorizing history into four specific periods, making it the most suitable choice.

Meaning: 'Divided' means to separate or to split into parts, which in this context refers to categorizing human history into four distinct eras.

Wrong options:

• proposed: 'Proposed' suggests putting forward an idea but does not imply the act of separating, making it contextually inappropriate here.
• postulated: 'Postulated' means to assume or suggest something as a basis for reasoning, which does not fit the context of categorizing history.
• partitioned: 'Partitioned' implies a physical division and is less commonly used in this abstract context of historical eras.

Correct answer: outlined

Explanation: The word 'outlined' is appropriate as it indicates that McLuhan provided a general description or framework for the concept, fitting grammatically and contextually with the sentence structure.

Meaning: 'Outlined' means to give a summary or a general description of something, which in this case refers to McLuhan's presentation of his theory in the book.

Wrong options:

• framed: 'Framed' suggests creating a structure but does not convey the idea of summarizing or describing a concept, making it less suitable here.
• sculpted: 'Sculpted' implies a physical shaping, which does not align with the abstract nature of outlining a concept.
• demarcated: 'Demarcated' means to set boundaries, which is not the intended meaning in the context of describing a theoretical concept.

Correct answer: released

Explanation: The word 'released' fits grammatically as it indicates that the book was made available to the public. It aligns contextually with the timing of the book's publication in relation to the rise of television.

Meaning: 'Released' means to make something available to the public, which in this context refers to the publication of McLuhan's book.

Wrong options:

• held: 'Held' implies keeping something in possession, which does not fit the context of publishing a book.
• provided: 'Provided' suggests giving something but does not convey the act of making a book available for public consumption.
• constructed: 'Constructed' implies building or creating something, which is not relevant to the publication of a book.

Correct answer: predicted

Explanation: The word 'predicted' is the correct past tense form that indicates McLuhan's assertion about the future state of the world. It fits grammatically and contextually as it describes his foresight regarding the electronic age.

Meaning: 'Predicted' means to say what will happen in the future, which in this case refers to McLuhan's view of the upcoming electronic age.

Wrong options:

• predicts: 'Predicts' is present tense and does not match the past context of the sentence.
• predicting: 'Predicting' is a gerund form and does not fit grammatically in this context where a past action is described.
• prediction: 'Prediction' is a noun and does not fit the grammatical structure required in this sentence.

Correct answer: access

Explanation: The word 'access' fits grammatically as it is a verb that indicates the ability to obtain or make use of something. It aligns contextually with the idea of everyone having the ability to reach the same information through technology.

Meaning: 'Access' means to obtain or make use of something, particularly information in this context.

Wrong options:

• read: 'Read' implies the act of consuming written material but does not convey the broader ability to obtain information.
• obtain: 'Obtain' suggests acquiring something but lacks the specific connotation of making use of information that 'access' provides.
• acquire: 'Acquire' means to gain possession of something, which does not fit the context of having the ability to use information.