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: Military service is fulfilled by voluntary enlistment, generally for a period of ____ years.\Question: Choose the right answer from options given a) four b) one c) nine d) two

SOLUTION: c

PROBLEM: Chlorine gives vinyl ____ advantages.\Question: Choose the right answer from options given a) six b) four c) two d) ten

SOLUTION: c

PROBLEM: Bougainvilleas are thorny and grow huge some reaching more than ____ stories in height.\Question: Choose the right answer from options given a) four b) two c) three d) six

SOLUTION:
c