Assonance is when you repeat a syllable or sound several times in a row in a single verse, it is often used to re-inforce the meaning and to make the reader pay special attention to what the author is saying with those words.
"Politic, cautious and meticulous" is the assonance that Alfred Prufrock is using by repeating the "Ti" sound.
The "ah" sound repeats itself in A: "p-AH-litic, c-AH-tious, and meticul-AH-s". Assonance in the repetition of vowel sounds in non-rhyming words. So, the answer is A.
