If X - Y means X is the sister of Y, X + Y means X is the brother of Y, and X × Y means X is the father of Y, what is the relationship of Z if X - Y × Z?

A. Z IS X'S DAUGHTER

In a coded relation, if M + N means M is the aunt of N, M - N means M is the uncle of N, and M × N means M is the cousin of N, what is the relationship of O if M + O - N?

D. O IS THE SISTER OF N

If D is the daughter of E and E is the mother of F, what is D's relationship to F?

A. SISTER

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

B. MOTHER

A is the son of B. C is the sister of B. D is the daughter of C. How is D related to A?

A. COUSIN