—Amy, please tell the people seated and ________ for their turns to come to my office five minutes later.

—Yes, sir.

A．wait

B．waiting

C．waited

D．to wait

MPLS中有转发等价类的概念，转发等价类的作用是（）。

A.转发等价类决定IP数据报如何在MPLS的LSP上转发

B.转发等价类决定如何建立LSP路径

C.转发等价类决定LSP与IP数据报文组的对应关系

D.转发等价类决定在LSP上如何加入标签