C
adverb is a part of speech that changes the meaning of a verb
What is the passage and where are the choices?
Based on the given sentence above, I can say that it is a compound sentence. What makes this sentence compound is that, it consists of two independent clauses and are connected by a coordinating conjunction "so". Therefore, the answer for this would be the last option: two independent clauses.
Hrothgar is the man who is described in these lines.
He was a famous king, whose men kept dying because the monster Grendel killed them all, so he felt a dire need to seek help from the great hero Beowulf.