Let U = {1, 2, 4, 5, A, B, C

Let U = {1, 2, 4, 5, a, b, c, d, e}. Find the complement of the set.
-O = {e, a, c, 4, 5}

A) {1, 2, 3, b, d}
B) {b, d, 1, 2, 3}
C) {1, 2, b, d}
D) {1, 2, b, c, d}