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

C. GRANDFATHER

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

A. SISTER

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

D. MOTHER-IN-LAW

If J ÷ K means J is the uncle of K, and K - L means K is the sister of L, what is the relationship between J and L?

A. COUSIN