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: Studies show that childhood obesity is epidemic and that ____ in five children is overweight.\Question: Choose the right answer from options given a) one b) two c) nine d) ten

A: a
****
Q: Sexual maturity is reached at about ____ years of age.\Question: Choose the right answer from options given a) five b) ten c) no d) two

A: d
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Q: Turkey is located at a point where ____ continents, Asia, Africa and Europe come together.\Question: Choose the right answer from options given a) six b) two c) seven d) three

A:
d
****