If D is the daughter of E and E is the mother of F, what is the relationship of F to D?

D. SIBLING

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

If A is the sister of B and B is the mother of C, what is A's relation to C?

A. AUNT

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

D. SIBLING

If A + B means A is the brother of B, B - C means B is the sister of C, and C * D means C is the mother of D, what is the relationship of A to D?

C. UNCLE