求助PS：Monthly kilowater-hours

The table above shows present rates and proposed rates for electricity for residential customers. For wich of the monthly kilowatt-hours shown would the proposed rate be the greatest percent increase over the present rate?

a) 500

B) 1,000

C) 1,500

D) 2,000

正解A. 我对题目的意思有点不理解。这道题的是不是求：proposed rate比 present rate 增加最多的是哪个？我觉得的AB相等啊。

A）(26-24)/500=2/500

B）(45-41)/1000=2/500

没有NN可以帮忙看看的吗

是