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]: Young children suffer from an average of six to ____ colds a year.\Question: Choose the right answer from options given a) ten b) eight c) two d) one
[EX A]: b

[EX Q]: Most bioluminescence is blue for ____ reasons.\Question: Choose the right answer from options given a) seven b) two c) four d) zero
[EX A]: b

[EX Q]: Recent studies show that ____ in every five school children has a major allergy.\Question: Choose the right answer from options given a) one b) seven c) three d) four
[EX A]:
a