Answer choice C correctly recapitulates the passage. It discusses the FTP and the Negro Units within it. The importance of the Negro Units to the history of black theatre in the United States, and it also discusses the diversity of views and interests among African Americans of the time. This was heavily emphasized throughout the passage.
Answer choice E falls short for multiple reasons. While the FTP did provide much needed aid for theatre during the Great Depression, it was not solely due to its support of the Negro Units as this answer choice would make it seem. It was due to its support of a national theatre. Additionally, this answer choice does not provide any mention of the importance of the Negro Unit's productions to the history of black theatre in the United States, nor did it mention the diversity of the productions.
I hope this helped, please let me know if you have any other questions.