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').

[Q]: Tropical trees can be rampant growers, and can outgrow a wiring in as little as ____ days' time.\Question: Choose the right answer from options given a) four b) eight c) six d) ten
[A]: d


[Q]: Birds reach sexual maturity in three to ____ years.\Question: Choose the right answer from options given a) seven b) two c) five d) six
[A]: c


[Q]: Plant based foods contain the ____ critical amino acids in varying amounts.\Question: Choose the right answer from options given a) five b) ten c) three d) six
[A]:
c