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]: Females reach sexual maturity around ____ to five year-olds.\Question: Choose the right answer from options given a) four b) five c) one d) ten
[EX A]: a

[EX Q]: Food waste is transformed into soil-like humus in ____ to seven days.\Question: Choose the right answer from options given a) ten b) five c) zero d) three
[EX A]: d

[EX Q]: Eagles acquire adult plumage at four to ____ years of age.\Question: Choose the right answer from options given a) six b) five c) seven d) four
[EX A]:
b