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: Most endocrinologists see patients every ____ months throughout the pregnancy.\Question: Choose the right answer from options given a) six b) two c) zero d) three

Output: b


Input: Consider Input: Black widows mature in ____ to four months.\Question: Choose the right answer from options given a) two b) seven c) eight d) zero

Output: a


Input: Consider Input: Metamorphosis takes over ____ months and the froglets come out really small.\Question: Choose the right answer from options given a) seven b) no c) five d) nine


Output: c