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').

Ex Input:
Women gain ____ years per child they had.\Question: Choose the right answer from options given a) ten b) nine c) four d) two

Ex Output:
d


Ex Input:
Female cats can go into heat for the first time as early as ____ months of age.\Question: Choose the right answer from options given a) four b) zero c) five d) eight

Ex Output:
c


Ex Input:
Most people recover in one to ____ months.\Question: Choose the right answer from options given a) no b) three c) seven d) eight

Ex Output:

b