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

Answer: d


Question: Females inherit ____ X chromosomes, one from each parent.\Question: Choose the right answer from options given a) five b) two c) no d) seven

Answer: b


Question: Male robins are well known for dive-bombing people and predators within ____ feet of a nest.\Question: Choose the right answer from options given a) one b) ten c) nine d) two

Answer:
b