I am sure the answer is B.
a word governing, and usually preceding, a noun or pronoun and expressing a relation to another word or element in the clause, as in “the man on the platform,” “she arrived after dinner,” “what did you do it for ?”.
I don't know exactly but i believe the answer is d
Grendel fears Hrothgar because of the Shaper. The Shaper has made Hrothgar so much more of a magnificent figure than he was before. In sense, the Shaper "shaped" Hrothgar's feats and reputation to a more amplified one, making Grendel fear the new and great Hrothgar by the skill of poetry and speech.
You should always end on a note that’s likely to stick in the reader’s mind.