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: Altimetric satellites are usually limited life missions lasting approximately three to ____ years.\Question: Choose the right answer from options given a) five b) ten c) four d) eight

SOLUTION: b

PROBLEM: Traditional neon electrifies the inert gas from ____ directions.\Question: Choose the right answer from options given a) two b) nine c) one d) six

SOLUTION: a

PROBLEM: Triplets are ____ berries on the same stalk.\Question: Choose the right answer from options given a) nine b) three c) seven d) six

SOLUTION:
b