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 Q]: Ground beef can last up to four months, and chicken parts can stay good for ____ months.\Question: Choose the right answer from options given a) ten b) no c) nine d) zero
[EX A]: c

[EX Q]: Respiratory therapists complete two to ____ years of education.\Question: Choose the right answer from options given a) no b) one c) four d) eight
[EX A]: c

[EX Q]: Mosquitoes can develop in any puddle that lasts more than four to ____ days.\Question: Choose the right answer from options given a) ten b) no c) two d) eight
[EX A]:
d