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]: Fats come in ____ different forms saturated and unsaturated.\Question: Choose the right answer from options given a) no b) two c) six d) seven
[EX A]: b

[EX Q]: Aridity is controlled by ____ climatic anomalies.\Question: Choose the right answer from options given a) five b) six c) three d) two
[EX A]:
c