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').
--------
Question: 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

Answer: a


Question: All quetzals have ____ legs.\Question: Choose the right answer from options given a) four b) zero c) eight d) ten

Answer: a


Question: Risk premium is a factor for individuals, but in the whole economy it is a ____ sum.\Question: Choose the right answer from options given a) zero b) ten c) no d) nine

Answer:
a