封禁ICMP协议，只转发212.78.170.166/27所在子网的所有站点的ICMP数据包，正确的access-list配置是______。
A．Router(config)#access-list 110 permit icmp 212.78.170.166 0.0.0.0 any
Router(config)#access-list 110 deny rcmp any any
Router(config)#access-list 110 permit ip any any
B．Router(config)#access-list 110 permit icmp 212.78.170.0 255.255.255.224 any
Router(config)#access-list 110 permit ip any any
Router(config)#access-list 110 deny icmp any any
C．Router(config)#access-list 110 permit icmp 212.78.170.0 0.0.0.255 any
Router(config)#access-list 110 deny icmp any any
Router(config)#access-list 110 permit ip any any
D．Router(config)#access-list 110 permit icmp 212.78.170.160 0.0.0.31 any
Router(config)#access-list 110 deny icmp any any
Router(config)#access-list 110 permit ip any any
