Question

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Answer 1

I believe it’s The history of American literature stretches across more than 400 years. It can be divided into five major periods, each of which has unique characteristics, notable authors, and representative works.
Or
The history of American literature stretches across more than 400 years. It can be divided into five major periods, each of which has unique characteristics, notable authors, and representative works.

I’m so sorry if I get it wrong