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: Infants usually die of pneumonia or other infections before reaching ____ years of age.\Question: Choose the right answer from options given a) nine b) four c) zero d) eight

SOLUTION: b

PROBLEM: Corms are undifferentiated, uniform, and contain ____ rings when cut apart.\Question: Choose the right answer from options given a) no b) three c) one d) zero

SOLUTION: a

PROBLEM: Maps have ____ or more bar scales, each in a different unit of measure.\Question: Choose the right answer from options given a) no b) four c) three d) ten

SOLUTION:
c