Graham Greene's works often focus on themes of
a. death.
b. survival.
c. betrayal.
d. optimism.
The answer that is most appropriate from the question is
that Graham Greene's works often focus on themes of betrayal. The answer is letter C.
Answer:

I understand. I am currently Ace rank, and even I have to ask questions sometimes to keep in check.
Answer:
I'm pretty sure that's a fragment, b/c it's not long enough to be a run-on, and it's not a complete sentence.
Explanation:
Answer:
They did not share the struggles and the triumphs of the rest of American society.