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

A. SISTER

If X * Y means X is the son of Y, X + Z means X is the sister of Z, and Y - Z means Y is the mother of Z, what is the relationship of Z to X in the expression X * Y + Z?

B. Z IS X'S SISTER

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

D. SIBLING

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

A. SISTER

If G is the uncle of H and H is the daughter of J, what is G's relationship to J?

D. BROTHER-IN-LAW