求助

meckychen

For the first time in the modern era, non-Hispanic Whites are officially a minority in California
, which amounts to a little less than half the population of the state, down from nearly there-quarters only a decade ago.

1. which amounts to a little less than half the population of the state, down from nearly three-quarters only a decade ago
   
2. which amounts to a little less than half the population of the state, down from a decade ago, when it was nearly three-quarters
   
3. and that amounts to a little less than half the population of the state, down from a decade ago, when they were nearly three-quarters
   
4. amounting to a little less than half the population of the state, down from nearly three-quarters a decade ago
   
5. amounting to a little less than half the population of the state, down from what it was a decade ago by nearly three-quarters
   

Answer: D我选了E，请大家帮我分析一下。谢谢。

sayysong

D的down from nearly three-quarters a decade ago
表示a decade ago 所占比例是 nearly three-quarters，从那时开始down，到现在的a little less than half

E的down from what it was a decade ago by nearly three-quarters
表示a decade ago是多少不知道(what it was)，在那个基础上down了nearly three-quarters，到现在的a little less than half
E改变了句意。