If J - K means J is the daughter of K, and K + L means K is the brother of L, what is the relationship of J to L?

C. NIECE

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

C. COUSIN

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

A. GRANDMOTHER

If P ÷ Q means P is the father of Q, and Q - R means Q is the sister of R, what is the relationship between P and R?

B. UNCLE

If M + N means M is the sister of N, and N * O means N is the mother of O, what is the relationship between M and O?

B. AUNT