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]: Worker bees have ____ pairs of wax glands on the underside of their abdomens.\Question: Choose the right answer from options given a) no b) two c) nine d) four
[EX A]: d

[EX Q]: Humans learn through the ____ senses.\Question: Choose the right answer from options given a) eight b) one c) five d) ten
[EX A]: c

[EX Q]: Acute colitis occurs most commonly in dogs and frequently responds to ____ to three weeks of therapy.\Question: Choose the right answer from options given a) nine b) five c) eight d) one
[EX A]:
d