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]: Vision disorders affect one in every ____ school-age children.\Question: Choose the right answer from options given a) five b) four c) nine d) one
[A]: b


[Q]: Material culture is the realm of ____ dimensional objects that make up our everyday environment.\Question: Choose the right answer from options given a) ten b) three c) six d) four
[A]: b


[Q]: Drugs of abuse have at least ____ categories of effects.\Question: Choose the right answer from options given a) nine b) seven c) five d) two
[A]:
d