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').
--------
Question: Insects have ____ pairs of legs and three body segments.\Question: Choose the right answer from options given a) one b) nine c) no d) three

Answer: d


Question: Vaporization can occur in temperatures as low as ____ degrees.\Question: Choose the right answer from options given a) one b) zero c) eight d) two

Answer: b


Question: China lies in ____ AEZs, all of which are subtropical and include some temperate areas.\Question: Choose the right answer from options given a) six b) five c) four d) nine

Answer:
c