I think it's D the poem convey it's theme
Possibly to emphasize it, or to mark it as being sarcastic. You choose.
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.
A is the answer to your question
The answer is B, The relative pronoun is that; it functions as part of the adverb clause.
