If X * Y means X is the mother of Y, and Y ÷ Z means Y is the daughter of Z, what is the relationship between X and Z?

A. GRANDMOTHER

If M - N means M is the father of N, and N + O means N is the brother of O, what is the relationship between M and O?

B. UNCLE

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

C. C IS THE DAUGHTER OF A

If M + N means M is the uncle of N, N - O means N is the sister of O, and O × P means O is the father of P, what is the relationship of P to M?

A. P IS THE NEPHEW OF M

In a coded relation, if A ÷ B means A is the son 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?

D. A IS THE GRANDSON OF D