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: Clover leaves with ____ to nine leaflets, illustrating a tendency to mutate.\Question: Choose the right answer from options given a) three b) zero c) ten d) five

SOLUTION: a

PROBLEM: Cats have ____ sets of vocal cords.\Question: Choose the right answer from options given a) zero b) nine c) two d) three

SOLUTION: c

PROBLEM: Sealants can normally last up to ____ years and hold up very well under normal chewing.\Question: Choose the right answer from options given a) two b) ten c) five d) four

SOLUTION:
c