Assonance takes place when two or more words close to one another repeat the same vowel sound but start with different consonant sounds.
Assonance is uses here because the words repeat the same vowel sounds but the words don't start with the same consonant.
Repitition of the same consonant sounds at the beginning of a group of words is alliteration.
The answer is A because is the most obvious and true answer because he uses words like fearful, bloody, fiery, you know.