Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Input: Consider Input: All baleen whales have ____ blow holes.\Question: Choose the right answer from options given a) zero b) four c) seven d) two

Output: d


Input: Consider Input: Evolution is dependent on ____ forces.\Question: Choose the right answer from options given a) no b) five c) two d) seven

Output: c


Input: Consider Input: Nutria reach sexual maturity at ____ to six months.\Question: Choose the right answer from options given a) two b) nine c) eight d) four


Output: d