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.