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]: Cows can be up to ____ times more active than normal while in heat.\Question: Choose the right answer from options given a) eight b) nine c) two d) six
[A]: a


[Q]: Piglets normally grow about half their potential growth rate from birth to ____ weeks of age.\Question: Choose the right answer from options given a) zero b) no c) five d) three
[A]: d


[Q]: Crystal stays in the body for about ____ to five days after use.\Question: Choose the right answer from options given a) one b) three c) seven d) five
[A]:
b