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: Mammals have only ____ sets of teeth.\Question: Choose the right answer from options given a) six b) five c) seven d) two

Output: d


Input: Consider Input: Most women notice their breasts become fuller and firmer within the first six to ____ weeks.\Question: Choose the right answer from options given a) four b) eight c) zero d) ten

Output: b


Input: Consider Input: Trees grow rapidly, often three to ____ feet or more in a single growing season.\Question: Choose the right answer from options given a) no b) one c) four d) five


Output: c