If A + B means A is the sister of B, A - B means A is the brother of B, and A × B means A is the mother of B, what is the relationship of C if A + C - B?

B. C IS THE BROTHER OF B

If G is the son of H and H is the mother of I, what is the relationship of I to G?

A. BROTHER

D is the daughter of E, and F is the son of E. What is F to D?

A. BROTHER

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

B. MOTHER

X is the father of Y. Y is the sister of Z. W is the brother of X. How is W related to Z?

A. UNCLE