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


[Q]: Distilled water enters the body with ____ minerals but leaves the body with minerals.\Question: Choose the right answer from options given a) zero b) no c) one d) nine
[A]: b


[Q]: Optometrists attend ____ years of optometry school before starting practice.\Question: Choose the right answer from options given a) seven b) five c) zero d) four
[A]:
d