Kennedy use parallelism to emphasize the potential for American society to become more divided by pointing out the possible actions that the American people can go to and the choices that black people can harbor against the white. He also predicted what would happen if the wrong choice was made. Parallelism is obviously used in this line:"black people amongst black, white people amongst white"
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A. The Narrator
" The Narrator- A young, upper-middle-class woman, newly married and a mother, who is undergoing care for depression. The narrator—whose name may or may not be Jane—is highly imaginative and a natural storyteller, though her doctors believe she has a “slight hysterical tendency.”
The answer is B. "which had been slowed by the accident" is extra information that the sentence doesn't need so you put a comma before and after "which had been slowed by the accident"