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:
Toenails are similar , except that they grow ____ times slower and are on the toes .\Question: Choose the right answer from options given a) two b) eight c) six d) four

Ex Output:
d

Ex Input:
All butterflies go through ____ distinct stages in their lives.\Question: Choose the right answer from options given a) eight b) seven c) four d) three

Ex Output:
c

Ex Input:
Exports account for one out of ____ manufacturing jobs in the United States.\Question: Choose the right answer from options given a) eight b) five c) two d) three

Ex Output:
b