Which additional word or words in the sentence should be capitalized?

Have you read Ray Bradbury's story "a sound of thunder"?

Choose all answers that are correct.

a. Of

b. A

c. Thunder

d. Sound

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.