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:
Ants have ____ stomachs.\Question: Choose the right answer from options given a) two b) nine c) four d) seven

Ex Output:
a


Ex Input:
Oysters reach a harvestable size in South Carolina at an age of about ____ years.\Question: Choose the right answer from options given a) two b) no c) one d) three

Ex Output:

d