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:
Young squirrels remain in the nest for about ____ weeks.\Question: Choose the right answer from options given a) seven b) six c) two d) eight

Ex Output:
b


Ex Input:
Marriage is the legal union of ____ people.\Question: Choose the right answer from options given a) one b) no c) five d) two

Ex Output:
d


Ex Input:
Any food can cause an allergic reaction, but only ____ foods cause nine out of ten reactions.\Question: Choose the right answer from options given a) two b) zero c) eight d) six

Ex Output:

c