Most parents are not __________ the danger of their babies’ eating jelly, which causes most unfortunate incidents to happen.

A．well aware to

B．very aware of

C．aware that

D．well aware of

可以在RIP配置模式下使用“neighbor”命令指定邻居路由器，以______方式发送路由更新信息。

A) 单播
B) 广播
C) 组播
D) 多播