<span>The poets intent in "Oread" is to present an image of a powerful sea. The author used various words to describe the action of the sea such as the words splash, hurl, and cover. So the answer to the question is the Powerful sea and it is stated in the letter C.
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I believe this is a dependant clause
The cause<span> of </span>death<span> remains unknown despite a careful review of the medical history, scene investigation, and autopsy.</span>
I think that that’s true, maybe.