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: Most gerbils live three to ____ years and have few health problems.\Question: Choose the right answer from options given a) three b) four c) seven d) zero

A: b
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Q: Sculpture involves the ____ different processes of carving and modeling.\Question: Choose the right answer from options given a) five b) three c) two d) ten

A: c
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Q: Threadworms can also be a problem for foals under ____ months of age.\Question: Choose the right answer from options given a) six b) nine c) two d) five

A:
a
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