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: All mass spectrometers consist of ____ distinct regions.\Question: Choose the right answer from options given a) three b) one c) two d) zero

SOLUTION: a

PROBLEM: Studies show that childhood obesity is epidemic and that ____ in five children is overweight.\Question: Choose the right answer from options given a) one b) two c) nine d) ten

SOLUTION: a

PROBLEM: Babies can range in age from newborn up to ____ years old.\Question: Choose the right answer from options given a) nine b) seven c) three d) two

SOLUTION:
c