J is the father of K. L is the son of K. How is J related to L?

A. GRANDFATHER

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 mother of B, what is the relation of C if A + B × C?

B. C IS A'S DAUGHTER

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?

C. C IS THE SON OF A

If P - Q means P is the sister of Q, P + R means P is the mother of R, and R × S means R is the daughter of S, what is the relationship of Q to S in the expression P - Q + R × S?

B. Q IS THE DAUGHTER OF S

If M is the uncle of N, and N is the daughter of O, what is the relationship of O to M?

C. BROTHER-IN-LAW