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: Orangutans spend up to ____ hours a day eating or foraging for food.\Question: Choose the right answer from options given a) seven b) nine c) three d) six

SOLUTION: d

PROBLEM: Darkness prevails ____ months of the year.\Question: Choose the right answer from options given a) three b) zero c) eight d) six

SOLUTION:
c