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]: Toucanets encompass ____ genera.\Question: Choose the right answer from options given a) seven b) six c) two d) one
[EX A]: c

[EX Q]: China has about ____ in four of all smokers in the world.\Question: Choose the right answer from options given a) one b) seven c) ten d) six
[EX A]: a

[EX Q]: Smoking is responsible for one in ____ deaths in Canada.\Question: Choose the right answer from options given a) ten b) nine c) five d) two
[EX A]:
c