Answer:
I believe that the correct answer to this question: Which of the underlined sections contains an error, would be, section A: Relationship between the poet Walt Whitman and Ralph Waldo Emerson; most famously.
Step-by-step explanation:
And the reason for this being wrong, is because of the incorrect use of the words most famously, and the semicolon, when describing why the relationship between the two poets has been so much commented on, or why it might have become tenouous at times. This grammatical error, and wrong use of words, show an inconsistency between what is being said before, the sentences with which the excerpt opens up, and the following information. All the other choices show consistency in the way that they offer the information and portray it. It is only in choice A that the reader needs to make a double-take to understand why the writer opens with a statement that clarifies that there has been a lot of interpretation on the differences between two friends, to then follow to explain specific circumstances that created distress between them.