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:
Cloves Chew ____ whole cloves.\Question: Choose the right answer from options given a) three b) four c) six d) five

Ex Output:
d


Ex Input:
Light can provide energy by ____ fundamentally different mechanisms.\Question: Choose the right answer from options given a) ten b) seven c) two d) three

Ex Output:

c