If M × N means M is the son of N, N - O means N is the sister of O, and O + P means O is the father of P, what is the relationship of M to P?

A. COUSIN

Choose a word similar to the group: Calm, Peaceful, Tranquil.

C. SERENE

Choose a word similar to the group: Happy, Joyful, Cheerful.

C. ELATED

If the code for 'CAT' is 12, 15, 18 and the code for 'DOG' is 14, 16, 20, what is the code for 'BIRD'?

C. 9, 11, 13, 15

Choose a word similar to the group: Fast, Quick, Rapid.

B. SWIFT