Answer: think about how to summarize the text.
Explanation:
The central idea of a text refers to the main point that an author is making about a particular topic. It is referred to as the author's primary message.
Sometimes the central idea in a text can be stated but sometimes can as be inferred. In such case, it's important to summarize the text in order to derive the main point.
Therefore, the correct option is B
I believe it's A, as it's asking for social context of the passage, meaning in what environment it was said at. (I may be wrong, please double check)
Answer: The cars
Explanation: the subject is the thing you are talking about, which in this sentence is cars.
Innovative phrase? or just inivative