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]: Dispassion is a ____ edged sword.\Question: Choose the right answer from options given a) six b) two c) zero d) four
[EX A]: b

[EX Q]: Every person is a carrier for about ____ rare genetic conditions.\Question: Choose the right answer from options given a) nine b) ten c) six d) three
[EX A]: b

[EX Q]: Loggers generally work in crews of ____ to eight workers.\Question: Choose the right answer from options given a) four b) no c) eight d) three
[EX A]:
a