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

C. C IS THE DAUGHTER OF A

A is the brother of B. C is the sister of A. How is C related to B?

A. SISTER

If M is the uncle of N and N is the daughter of O, what is M's relation to O?

C. BROTHER-IN-LAW

If A is the brother of B, and B is the sister of C, how is A related to C?

A. BROTHER

If A is the brother of B, and B is the sister of C, what is A's relationship to C?

A. BROTHER