The correct answer is B) slant rhyme,
The type of sound device that appears in the excerpt from “The Road Not Taken” by Robert Frost is slant rhyme.
Slant rhyme is the type of rhyme when two words at the end of the line end in similar consonant sounds. Not exactly the same, but similar sound. Slant rhyme also can include words which last syllables have assonance or consonance in the last syllables.
The other options of the answer were A) alliteration, C) consonance d end rhyme, and D) end rhyme.