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:
Some male fish return after just ____ years.\Question: Choose the right answer from options given a) no b) two c) one d) six

Ex Output:
b


Ex Input:
Most linguists organize the African languages into ____ major language families.\Question: Choose the right answer from options given a) three b) four c) eight d) no

Ex Output:
b


Ex Input:
Illiteracy is ____ percent higher among women than men.\Question: Choose the right answer from options given a) seven b) six c) zero d) five

Ex Output:

a