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:
Eastern cottontails have ____ different fur coats each year.\Question: Choose the right answer from options given a) five b) two c) eight d) six

Ex Output:
b


Ex Input:
Some European countries require ____ years of education.\Question: Choose the right answer from options given a) no b) nine c) six d) three

Ex Output:
d


Ex Input:
Exports support ____ out of every five manufacturing jobs in the United States.\Question: Choose the right answer from options given a) ten b) zero c) eight d) one

Ex Output:

d