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: TriMetal Irons Discover the benefits of ____ different metals.\Question: Choose the right answer from options given a) five b) seven c) no d) three

SOLUTION: d

PROBLEM: Double price is based on two golfers sharing ____ room.\Question: Choose the right answer from options given a) one b) zero c) six d) nine

SOLUTION: a

PROBLEM: Reactive resin is the last of the ____ types of balls.\Question: Choose the right answer from options given a) nine b) seven c) five d) three

SOLUTION:
d