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]: Influenza epidemics are ____ times more likely during solar maxima.\Question: Choose the right answer from options given a) ten b) eight c) no d) four
[EX A]: d

[EX Q]: Midrange drivers are used in multi-way speakers with ____ or more driver sizes.\Question: Choose the right answer from options given a) one b) five c) four d) three
[EX A]: d

[EX Q]: Corn snakes make good pets because they grow to only four to ____ feet in length and are very hardy.\Question: Choose the right answer from options given a) no b) five c) ten d) nine
[EX A]:
b