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]: Many animals use two or ____ forest structure types.\Question: Choose the right answer from options given a) eight b) zero c) two d) three
[EX A]: d

[EX Q]: Perennial grass takes three to ____ years before it is mature enough to produce adequate seed.\Question: Choose the right answer from options given a) five b) seven c) six d) four
[EX A]: a

[EX Q]: Mitosis is a continuous process which has been broken down into ____ stages.\Question: Choose the right answer from options given a) five b) no c) eight d) six
[EX A]:
a