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:
Roundworms are fairly large worms that can grow to be ____ or five inches long.\Question: Choose the right answer from options given a) no b) nine c) four d) zero

Ex Output:
c


Ex Input:
Beavers live in families that include an adult pair and ____ to three years worth of offspring.\Question: Choose the right answer from options given a) no b) one c) four d) ten

Ex Output:
b


Ex Input:
Snow falls only every ____ or three years.\Question: Choose the right answer from options given a) two b) zero c) ten d) seven

Ex Output:

a