Answer:
the answer is a little more complicated than that because the people who work for them have been working hard
The best answer is A.
although B and C are correct, they mostly miss the point of the sentence.
1.Expository
2. poetry
3. most famous drama
4. young adult fiction
5. choose which genre
6.used nonfiction
7.biography of her father
8.prose writing is boring
9. as he wrote his autobiography