At the Copenhagen conference, all the countries were called on to do all they could to control greenhouse gas emissions________it was too late.

A．when

B．after

C．until

D．before

王安石曾经批评过李贺的一首诗：“方黑云压城，岂有向日之甲光。”请问王安石批评的是李贺的哪首诗？