The answer is option D.
In the poem "The River Merchant's Wife: A Letter," by Ezra Pound, the speaker makes reference to the paired yellow butterflies to suggest that she is growing old and that she is not with her beloved husband. Actually, she misses him and longs to meet him again.
The the beginning of the Civil War, President Lincoln ordered the U.S. Navy to place a blockade along almost 3,500 miles of Atlantic Coastline. This was so the Union could stop them from importing products in and from exporting their own good out of the country. Though many smaller Confederate shops were able to get out of the ports, they only had a little bit of goods, and the South needed much more to support their economy.
Answer: C , “That these walls oppression builds / Will have to go!”
The climax is the final "working out of the plot."