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

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

A. COUSIN

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 = true?

A. C IS THE SISTER OF B