The following words should be capitalized: B) A, D) Sound, and C) Thunder.
When it comes to the names of novels an such, all words (except for prepositions and linking verbs) should be capitalized. For example - The Lord of the Rings, A Sound of Thunder, etc.
The statement that best describes the effect of alliteration is "words fills and dafodils , emphasizing the effects of"
Explanation:
Alliteration refers to occurrence of the same letter or sound at the beginning of adjacent or closely connected words like "she sells sea shells"
Here, the line emphasizing the effects represents an alliteration hence the statement which best describes the effect of alliteration in the given stanza is is "words fills and dafodils , emphasizing the effects of".
(Eliot 75)
When it comes to parenthetical citations, I am going to assume that you are using MLA guidelines. If so, it is only necessary to cite the author's last name, followed by the page number, with no parentheses between them. The last choice is the only one that just gives the last name, so it is correct.