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').

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
b

Some taxonomists classify only ____ species though.\Question: Choose the right answer from options given a) one b) six c) two d) three
c

Most mechanical watches use a least ____ different lubricants for various parts of the mechanism.\Question: Choose the right answer from options given a) three b) five c) ten d) four

b