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').
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Question: Most aphthous ulcers heal in one to ____ weeks.\Question: Choose the right answer from options given a) two b) eight c) one d) seven

Answer: a


Question: Chipmunks produce one or ____ litters a year.\Question: Choose the right answer from options given a) three b) one c) ten d) two

Answer: d


Question: Pigs grow very quickly and are normally ready for sale at four to ____ months of age.\Question: Choose the right answer from options given a) eight b) six c) no d) four

Answer:
b