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: Mountain goats have ____ sharp horns.\Question: Choose the right answer from options given a) two b) six c) ten d) four

A: a
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Q: Women live an average of five to ____ years longer then men.\Question: Choose the right answer from options given a) one b) five c) ten d) seven

A: d
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Q: Giraffes sleep less than ____ hours a day.\Question: Choose the right answer from options given a) two b) six c) seven d) ten

A:
a
****