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: Coccidiosis usually occurs from ____ weeks of age.\Question: Choose the right answer from options given a) zero b) no c) three d) eight

SOLUTION: c

PROBLEM: National immunization vaccinates all children under ____ against polio.\Question: Choose the right answer from options given a) zero b) four c) ten d) five

SOLUTION: b

PROBLEM: Rod cells are about ____ magnitudes more sensitive to light than cone cells.\Question: Choose the right answer from options given a) four b) zero c) ten d) eight

SOLUTION:
a