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:
Statistics show that within ____ years of divorce, many people marry a second time.\Question: Choose the right answer from options given a) four b) nine c) six d) three
answer:
d


question:
Buildings gain heat in ____ ways - conduction, convection, and radiation.\Question: Choose the right answer from options given a) no b) ten c) seven d) three
answer:

d