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: Hamsters can live to be three to ____ years old.\Question: Choose the right answer from options given a) four b) two c) three d) nine

Output: a


Input: Consider Input: Aridity presents ____ main obstacles to solitary behavior.\Question: Choose the right answer from options given a) no b) three c) two d) five

Output: c


Input: Consider Input: Calumet County has ____ incorporated villages and cities and nine towns.\Question: Choose the right answer from options given a) six b) ten c) no d) nine


Output: b