If X - Y means X is the sister of Y, Y + Z means Y is the brother of Z, and Z × W means Z is the father of W, what is the relationship of W to X if the expression is X - Y + Z × W?
Answer: D. W is the son of X
From X - Y + Z × W, we deduce that X is the sister of Y, Y is the brother of Z, and Z is the father of W, making W the son of X.