Their eyes were watching god and how to read literature like a professor

It seems like the question is asking introduction of the two books, which is as below;

Their Eyes Were Watching God is a 1937 narrative and the best known work by African-American essayist Zora Neale Hurston. The novel describes principle character Janie Crawford's aging from an energetic, however voiceless, adolescent young lady into a lady with her finger on her fate.  

The second book How to Read Literature Like a Professor by Thomas C. Foster that was printed in 2003. The creator proposes understandings of topics, ideas, and conceivable images usually found in writing.  

the answer is:

c. economic output