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]: Orangutans spend up to ____ hours a day eating or foraging for food.\Question: Choose the right answer from options given a) seven b) nine c) three d) six
[A]: d


[Q]: Cows breed at ____ years, bulls at four.\Question: Choose the right answer from options given a) two b) three c) seven d) one
[A]: b


[Q]: Human eye are only about ____ times sharper than a jumping spider's.\Question: Choose the right answer from options given a) five b) ten c) zero d) nine
[A]:
a