Even though you do not provide the underlined part of the quotation from paragraph 10, the answer to this question is quite easy to pinpoint due to advanced knowledge of the English language.
The best sentence is the one which offers a syntactic inversion, because it is the one that produces a more emphatic result. And being that the main purpose of inversions, it seems quite an obvious pick.
So, the final answer for this question is:
B) ‘seldom does a sight more grand and more striking meet a person’s eyes, as when he sees the Overland train slowing…’
This sentence provides more emphasis as well as a better and clearer grammatical construction.
Answer:
D. is precise, (but A. Is sadly amusing).
Explanation:
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 />
It number 4.) Has a deep affection for Amphimedon