In a coded relation, if A + B means A is the father of B, A - B means A is the mother of B, and A × B means A is the son of B, what is the relationship between C and D if C - D + E?

A. C IS THE MOTHER OF D

If P is the uncle of Q and Q is the daughter of R, what is the relationship of R to P?

C. SISTER-IN-LAW

If M × N means M is the daughter of N, M + N means M is the son of N, and M - N means M is the wife of N, what is the relationship between O and N if O - M + N?

C. O IS THE WIFE OF M

If S is the grandmother of T and T is the son of U, what is the relationship of U to S?

C. DAUGHTER-IN-LAW

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

A. BROTHER