The correct answer is option B. She uses rhyme, but he does not.
Emily Dickinson's poems use rhymes. In fact, she uses different types of rhymes even sometimes in the same poem, such as slant rhymes or exact rhymes, among others.
While Walt Whitman was characterized by being "the father of free verse", since his poems do not have any structure.
Let us remember that a rhyme is a set of phonemes or sounds that are repeated in two or more verses from the last vowel accented within a poem or song.
Between makes the most sense.