D is the conflict of the play.
It is important because the sources tell you whether the article was credible. When you have an article that has bad source, you are running the risk of having, wrong, opinionated data. This can discredit you paper if you use it.
Answer:
A
Explanation:
It seems to bring a dangerous mood to the paragraph, like the jagged waves that seemed thrust up in points like rocks.
Hope that helps! :)