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]: Human rabies is extremely rare, and there have been no cases in Oregon in the last ____ years.\Question: Choose the right answer from options given a) nine b) five c) ten d) eight
[A]: d


[Q]: Twin souls are the last ____ souls to individualize.\Question: Choose the right answer from options given a) two b) ten c) zero d) six
[A]: a


[Q]: Breast cancer is the most common cancer among women, accounting for ____ in three cancers diagnosed.\Question: Choose the right answer from options given a) ten b) five c) two d) one
[A]:
d