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]: China has about ____ in four of all smokers in the world.\Question: Choose the right answer from options given a) one b) seven c) ten d) six
[A]: a


[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


[Q]: Cowbirds are six to ____ inches long, with short, conical bills and short tails.\Question: Choose the right answer from options given a) no b) two c) seven d) eight
[A]:
d