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.
forming two clauses and is illogical
I would say its C) <span>We hoped that the restaurant manager would sponsor our baseball team.
I am not 100% sure that it is right but I hope it helps!</span>