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]: Bulbs bloom four to ____ weeks after planting.\Question: Choose the right answer from options given a) seven b) one c) six d) nine
[EX A]: c

[EX Q]: Fever usually lasts for an average of ____ days in adults.\Question: Choose the right answer from options given a) zero b) three c) nine d) two
[EX A]: b

[EX Q]: Hellbenders have ____ toes on their front feet and five on their hind feet.\Question: Choose the right answer from options given a) zero b) four c) two d) ten
[EX A]:
b