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: Butterflies have ____ stages in their life cycle.\Question: Choose the right answer from options given a) two b) four c) no d) eight

A: b
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Q: Chacoan peccaries are the largest of the ____ peccary species.\Question: Choose the right answer from options given a) eight b) three c) ten d) no

A: b
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Q: Smoking causes nearly ____ in five U.S. deaths.\Question: Choose the right answer from options given a) no b) one c) four d) ten

A:
b
****