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