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: Some sources claim there are more like ____ million vertebrate animals in zoos.\Question: Choose the right answer from options given a) six b) five c) one d) three

Output: b


Input: Consider Input: Babies show an interest in solid foods when they are approximately four to ____ weeks old.\Question: Choose the right answer from options given a) nine b) eight c) five d) six

Output: c


Input: Consider Input: Friendship is a single soul dwelling in ____ bodies.\Question: Choose the right answer from options given a) two b) zero c) eight d) no


Output: a