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: Many aneurysms have ____ symptoms until they burst.\Question: Choose the right answer from options given a) no b) five c) six d) seven

Answer: a


Question: Firebrat eggs hatch in about ____ weeks.\Question: Choose the right answer from options given a) ten b) one c) two d) no

Answer: c


Question: Female terrapins store sperm and thus can produce fertilized eggs up to ____ years after mating.\Question: Choose the right answer from options given a) four b) three c) five d) nine

Answer:
a