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]: Respiratory therapists complete ____ to four years of education.\Question: Choose the right answer from options given a) one b) nine c) zero d) two
[A]: d


[Q]: Statistics show that within ____ years of divorce, many people marry a second time.\Question: Choose the right answer from options given a) four b) nine c) six d) three
[A]: d


[Q]: Some nymphs live underwater for ____ years or more.\Question: Choose the right answer from options given a) four b) seven c) one d) three
[A]:
d