I understand that the governor is considering a new proposal

I understand that the governor is considering a new proposal
A which would eliminate unnecessary writing in government
B that would eliminate unnecessary writing in government
可我觉得A也不错啊?
先行词是物时，用which、whose作引导词，可以在从句中作主语。宾语、表语等。
例：Is this the letter which(that) I have to typewrite right now?
1949 was the year which saw great changes in China.
1949 was the year when New China was founded.
That is the room whose door needs painting.
请不要为了解释答案就想当然。