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').
--------
Question: Most children improve in three to ____ days.\Question: Choose the right answer from options given a) seven b) six c) four d) ten

Answer: a


Question: 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

Answer: b


Question: Turtles are fully mature when their shell length is ____ inches long.\Question: Choose the right answer from options given a) eight b) ten c) three d) four

Answer:
a