If X - Y means X is the sister of Y, Y + Z means Y is the brother of Z, and Z × X means Z is the father of X, what is the relationship of Y to X?

A. Y IS X'S BROTHER

X is the father of Y. Y is the daughter of Z. How is Z related to X?

B. WIFE

If A is the brother of B, and B is the sister of C, what is the relationship of A to C?

A. BROTHER

If A is the mother of B and B is the sister of C, what is the relationship between A and C?

B. MOTHER

If A is the brother of B, and B is the sister of C, what is the relationship of C to A?

D. SIBLING