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').

[EX 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
[EX A]: b

[EX Q]: Mothers typically have from one to ____ cubs, which are born blind and toothless.\Question: Choose the right answer from options given a) six b) zero c) four d) seven
[EX A]: a

[EX Q]: Most families have between ____ and eight children.\Question: Choose the right answer from options given a) four b) one c) five d) three
[EX A]:
c