答案为什么选A而不选B

题目

答案为什么选A而不选B
The high housing price has become a serious problem among young people in China,_A_ the government hasn't yet found a better solution to.
A one B the one

答案

one 代替a problem引导定语从句.用the则是表示要对这个问题的影响、起因或解决方法进一步阐述这里没有,只是补充说明这个问题的特点,所以不选B