If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + C - B means A is the brother of C and C is the sister of B?
Answer: C. C is the daughter of A
From A + C - B, we deduce that A is the brother of C and C is the sister of B, making C the daughter of A.