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]: Perennial grass takes ____ to five years before it is mature enough to produce adequate seed.\Question: Choose the right answer from options given a) six b) zero c) three d) no
[EX A]: c

[EX Q]: Sculpture involves the ____ different processes of carving and modeling.\Question: Choose the right answer from options given a) five b) three c) two d) ten
[EX A]: c

[EX Q]: Tobacco smoke contains more than ____ thousand substances, most of which are harmful.\Question: Choose the right answer from options given a) zero b) six c) seven d) four
[EX A]:
d