【单选题】

Cisco路由器执行show access-list命令显示如下一组信息：

Standard IP access list block
deny 10.0.0.0, wildcard bits 0.255.255.255 log
deny 172.16.0.0, wildcard bits 0.15.255.255
permit any
根据上述信息，正确的access-list配置是
A、Router(config) # access-list standard block
Router(config-std-nac1) # deny 10.0.0.0 255.0.0.0 log
Router(config-std-nac1) # deny 172.16.0.0 255.240.0.0
Router(config-std-nac1) # permit any
B、Router(config) # ip access-list standard block
Router(config-std-nac1) # permit any
Router(config-std-nac1) # deny 10.0.0.0 0.255.255.255 log
Router(config-std-nac1) # deny 172.16.0.0 0.15.255.255
C、Router(eonfig) # ip access-list standard block
Router(config-std-nac1) # deny 10.0.0.0 255.0.0.0 log
Router(config-std-nac1) # deny 172.16.0.0 255.240.0.0
Router(config-std-nac1) # permit any
D、Router(config) # ip access-list standard block
Router(config-std-nac1) # deny 10.0.0.0 0.255.255.255 log
Router(config-std-nac1) # deny 172.16.0.0 0.15.255.255
Router(config-std-nac1) # permit any