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: Dogs are pack animals, and ____ dogs is the minimum number for proper socialization.\Question: Choose the right answer from options given a) four b) five c) no d) zero

SOLUTION: b

PROBLEM: Cnidarian bodies have two or sometimes ____ layers.\Question: Choose the right answer from options given a) seven b) two c) three d) six

SOLUTION:
c