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]: Fryers have ____ thermostats.\Question: Choose the right answer from options given a) five b) three c) two d) one
[EX A]: c

[EX Q]: Gases are perhaps the best understood of the ____ states of matter.\Question: Choose the right answer from options given a) three b) five c) nine d) zero
[EX A]: a

[EX Q]: Fawns are weaned when three to ____ months old, and are sexually mature at about six months.\Question: Choose the right answer from options given a) no b) zero c) ten d) four
[EX A]:
d