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:
Younger children can produce as much as ____ times more saliva than adults.\Question: Choose the right answer from options given a) one b) ten c) five d) eight

Ex Output:
d


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:
Children move developmentally through ____ stages as they begin to write.\Question: Choose the right answer from options given a) no b) five c) two d) zero

Ex Output:

b