Task: Question Answering
Input (English): Set A contains the letters A, E, I, O, and U. Set B contains the letters A, B, C, D, and E. What is the difference between the number of elements in the union of the two sets and the number of elements in their intersection?
(A)4 (B)6 (C)7 (D)8 (E)10
Output (English): B