If A = {x : x is a letter in the word FOLLOW} and B = {y : y is a letter in the word WOLF}, then
AA ⊂ B because WOLF is shorter than FOLLOW
BA and B are disjoint sets
CA ≠ B since FOLLOW has more letters
DA = B because the distinct letters of both words are {F, O, L, W}
Answer & Solution
Correct answer: D. A = B because the distinct letters of both words are {F, O, L, W}
Distinct letters of FOLLOW = {F, O, L, W}; distinct letters of WOLF = {W, O, L, F}. Both sets contain the same elements, so A = B regardless of word length.
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