I believe the correct answer from the choices listed above is option B. The correct sentence would be "If she doesn't graduate in December, she willgraduate in June." This is the only sentence where the comma is in the right place while the others are wrongly placed.
The passage lists a few things which would lend towards the idea of him being a monster. First, it says "god's anger bare he." referring, presumably, to the abrahamic god famous for his wrath, showing that Grendel was exhibiting intense rage. Second, it uses the sentence "The monster intended some one of earthmen in the hall-building grand to entrap and make way with" which, while a written a little backwards by today's grammar rules, says that he is planning to take hold of and kidnap some of the men in the hall, something only a monster could do.<span />
<span>D.) The woman goes to the mirror dutifully, as one who dutifully worships.
Comparing the mirror to the eye of a god shows that the woman is constantly going to the mirror as one goes to church regularly. She is trying to gain some sort of heavenly insight into herself, as someone would be trying to get religious insight by worshiping. </span><span />
