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

B. BROTHER

If D is the daughter of E, and E is the sister of F, what is the relationship of D to F?

A. NIECE

If X is the daughter of Y and Y is the sister of Z, what is the relationship of X to Z?

A. NIECE

If M is the father of N and N is the son of O, what is the relationship of O to M?

D. MOTHER

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

A. BROTHER