对不起，问一个傻傻的问题。

shintty

2) 很少会有人在HOUSE上安装太阳能板，因为COST远大于SAVING on electric, ask WEAKEN.
A. oil price increase recently
B. electric price increase
C. Install will not lead house price increase.
Choose C, (A, B, C are not real)

为什么不是B

lixiaoyang

i think b is ok