TASK DEFINITION: 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').
PROBLEM: Vision disorders affect ____ in every four school-age children.\Question: Choose the right answer from options given a) nine b) one c) five d) six

SOLUTION: b

PROBLEM: Diarrheal disease kills ____ million children every year.\Question: Choose the right answer from options given a) three b) no c) four d) ten

SOLUTION: a

PROBLEM: Carpels are the innermost of the ____ whorls of modified leaves that make up a flower.\Question: Choose the right answer from options given a) four b) nine c) ten d) two

SOLUTION:
a