If M + N means M is the father of N, M - N means M is the daughter of N, and M × N means M is the son of N, what is the relationship of O if M + O - N?

A. O IS THE DAUGHTER OF N

A is the grandmother of B. C is the daughter of B. How is A related to C?

B. GRANDMOTHER

If M + N means M is the sister of N, M - N means M is the brother of N, and M × N means M is the daughter of N, what is the relationship of O if M + O × N?

B. O IS THE DAUGHTER OF M

P is the daughter of Q. R is the brother of Q. S is the son of R. How is S related to P?

A. COUSIN

M is the grandmother of N. N has a brother O. How is M related to O?

C. GRANDMOTHER