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:
Rock cavies become sexually mature when they are about one to ____ months old.\Question: Choose the right answer from options given a) one b) four c) three d) seven

Ex Output:
c


Ex Input:
Litters contain from one to ____ kittens, and tend to be much larger when prey is abundant.\Question: Choose the right answer from options given a) three b) four c) two d) seven

Ex Output:
b


Ex Input:
Vaccinations can protect for three to ____ years.\Question: Choose the right answer from options given a) eight b) seven c) five d) ten

Ex Output:

c