The answer is A.
Understanding the words in a poem will help the performer to better express the poem which results in a better reaction from the audience.
The answer would be B. Answers A, C, and D are fragments of a sentence, lacking a complete idea.
Ex:
A) "because I had not slept for hours" - "because" what? An example of a complete version of this sentence would be "My head hurts because I had not slept for hours."
