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: Living cells have at least ____ parts.\Question: Choose the right answer from options given a) seven b) three c) zero d) four

Answer: b


Question: Most people have ____ kidneys.\Question: Choose the right answer from options given a) two b) five c) seven d) six

Answer: a


Question: Luminosity decreases by almost four orders of magnitude in approximately ____ million years.\Question: Choose the right answer from options given a) one b) five c) eight d) seven

Answer:
b