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').
--------
Question: Perennial grass takes three to ____ years before it is mature enough to produce adequate seed.\Question: Choose the right answer from options given a) five b) seven c) six d) four

Answer: a


Question: Many aneurysms have ____ symptoms until they burst.\Question: Choose the right answer from options given a) no b) five c) six d) seven

Answer: a


Question: Breastfed babies are half as likely to develop respiratory illness in their first ____ years.\Question: Choose the right answer from options given a) one b) seven c) two d) no

Answer:
b