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

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

B. HUSBAND

If K is the daughter of L and M is the sister of L, what is the relationship of M to K?

A. AUNT