instruction:
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').
question:
Reverse osmosis uses ____ to ten gallons of water to produce one gallon of drinking water.\Question: Choose the right answer from options given a) two b) zero c) five d) three
answer:
d


question:
Some people have ____ symptoms until the liver has been quite severely damaged.\Question: Choose the right answer from options given a) eight b) no c) nine d) ten
answer:
b


question:
Color blindness is fairly common, affecting about ____ percent of all humans.\Question: Choose the right answer from options given a) seven b) eight c) four d) nine
answer:

d