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: Government buildings fly flags of the ____ nations.\Question: Choose the right answer from options given a) ten b) no c) seven d) two

Output: d


Input: Consider Input: Hybridization is the practice of ____ different species interbreeding.\Question: Choose the right answer from options given a) no b) one c) two d) three

Output: c


Input: Consider Input: Some animals can survive freezing, but ____ animals can survive grinding.\Question: Choose the right answer from options given a) no b) three c) seven d) zero


Output: a