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').

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

A: b
****
Q: Conglomerate integration is when ____ apparently unconnected companies merge.\Question: Choose the right answer from options given a) two b) six c) no d) three

A: a
****
Q: Most spiders have eight eyes, some only ____ and several have fewer or none.\Question: Choose the right answer from options given a) six b) ten c) three d) one

A:
a
****