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Which of the following is one of the ways American literature changed early in the twentieth century?

AAuthors began to write more often about extraordinary people and the problems of society's elite.

BAuthors began to write more often about everyday people and the problems of ordinary life.

CAuthors began to write more often about dangerous people and the problems society has in dealing with them.

DAuthors began to write more often about highly educated people and the problems of philosophy.