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]: Litters contain from one to ____ kittens, and tend to be much larger when prey is abundant.\Question: Choose the right answer from options given a) three b) four c) two d) seven
[A]: b


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


[Q]: Natural gas contains four atoms of hydrogen for every ____ atom of carbon.\Question: Choose the right answer from options given a) zero b) one c) eight d) five
[A]:
b