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]: Mosquitoes spend one to ____ days in the pupae stage.\Question: Choose the right answer from options given a) zero b) two c) five d) three
[EX A]: b

[EX Q]: Earwigs produce ____ or two generations every year.\Question: Choose the right answer from options given a) two b) no c) one d) nine
[EX A]: c

[EX Q]: Sexual maturity is between ____ and six years of age.\Question: Choose the right answer from options given a) six b) seven c) three d) two
[EX A]:
c