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: Collars come in ____ shapes.\Question: Choose the right answer from options given a) six b) two c) four d) zero

SOLUTION: b

PROBLEM: Meteorologists rely mainly on ____ types of satellites.\Question: Choose the right answer from options given a) four b) two c) ten d) three

SOLUTION: b

PROBLEM: Fire protection falls into ____ main categories, prevention and protection.\Question: Choose the right answer from options given a) three b) six c) seven d) two

SOLUTION:
d