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:
Prairie voles look like rodents with small rounded bodies, ____ short legs and a short tail.\Question: Choose the right answer from options given a) two b) nine c) four d) zero

Ex Output:
c


Ex Input:
Some people have ____ symptoms until the liver has been quite severely damaged.\Question: Choose the right answer from options given a) eight b) no c) nine d) ten

Ex Output:
b


Ex Input:
Small tadpoles hatch out after ____ to three weeks .\Question: Choose the right answer from options given a) four b) seven c) two d) six

Ex Output:

c