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 toddlers find it hard to sit still for more than a few seconds, let alone ____ minutes.\Question: Choose the right answer from options given a) no b) three c) four d) zero

A: b
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Q: People can go without food for up to about ____ weeks.\Question: Choose the right answer from options given a) three b) one c) nine d) four

A: a
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Q: Most sharks have five pairs of gill slits, but some have ____ or seven pairs.\Question: Choose the right answer from options given a) ten b) nine c) five d) six

A:
d
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