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').

[EX Q]: Pups remain in the den for about ____ weeks, and are cared for by the entire pack.\Question: Choose the right answer from options given a) ten b) three c) six d) no
[EX A]: c

[EX Q]: Wind is renewable, and produces ____ emissions or by-products.\Question: Choose the right answer from options given a) five b) nine c) zero d) no
[EX A]: d

[EX Q]: Drug abusers are ____ times more likely to file a workers' compensation claim.\Question: Choose the right answer from options given a) ten b) five c) three d) zero
[EX A]:
b