In the sequence A, B, C, ?, E, F, what character should replace the question mark?

A. D

If X - Y means X is the uncle of Y, X + Y means X is the aunt of Y, and X ÷ Y means X is the brother of Y, what is the relationship of Z if X - Y ÷ Z?

A. Z IS X'S NEPHEW

A is the brother of B. C is the sister of A. D is the mother of B. How is C related to D?

A. DAUGHTER

What character should replace the question mark in the pattern: X, Y, Z, A, B, ?

A. C

Given the input '5 3 4 1 2', what is the output after sorting the numbers in descending order?

A. 5 4 3 2 1