I believe there is a mistake in your choices, because I don't see the correct choice here. The correct answer should be ABAB ABCB. This is because in the first stanza, the first line A (son) rhymes with the third line A (shun), and the second line B (catch) rhymes with the fourth line B (Bandersnatch) - which makes the first stanza ABAB. In the second stanza, the first line A doesn't rhyme with anything (hand), the second line B (sought) rhymes with the fourth line B (thought), and the third line C doesn't rhyme with anything - which makes the second stanza ABCB.
For a strong conclusion, you have to restate the thesis by making the same point with other words. Review your supporting ideas, then summarize all arguments by paraphrasing how you proved the thesis. Connect back to the essay hook and relate your closing statement to the opening one.
