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: Roundworms are fairly large worms that can grow to be ____ or five inches long.\Question: Choose the right answer from options given a) no b) nine c) four d) zero

Answer: c


Question: Animals develop either ____ or three embryonic germs layers .\Question: Choose the right answer from options given a) nine b) six c) five d) two

Answer:
d