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: Trappers have ____ genders and reproduce sexually.\Question: Choose the right answer from options given a) zero b) two c) five d) one

A: b
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Q: Harbor porpoises live in groups averaging one to ____ individuals and are very skittish.\Question: Choose the right answer from options given a) seven b) five c) two d) three

A: d
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Q: Eagles are predators that are very dependent on being able to see in ____ dimensions.\Question: Choose the right answer from options given a) no b) three c) six d) one

A:
b
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