Add answer choices because without i cant help you just re-post it with answer choices
Answer:
I believe the answer is D
Explanation:
Since you did not put up an answer choice, the purpose for Whitman's use of repetition of words and sounds is to underscore the theme for emphasis, and for emotional effect.
C the evidence because that is the most part of an argument which is true and which is facts, nothing about it is false because it is proven and taken out of real life. The evidence backs up the reasons and claim it backs up everything of the whole argument it is what makes the reader want to join the authors side of the argument.