【单选题】
A Router(config)#ip access-list extended 100 Router(config-ext-nacl)#5 permit ip 172.20.10.0 0.0.0.255 any log Router(config)#interface GigabitEthernet0/1 Router(config-if)#access-group 100 in
B Router(config)#no access-list 100 permit ip 172.16.0.0 0.0.15.255 any Router(config)#access-list 100 permit ip 172.16.0.0 0.0.15.255 any log Router(config)#interface Gigabit Ether net0/1 Router(config-if)#access-group 100 in
C Router(config)#access-list 100 permit ip host 172.20.10.1 any log Router(config)#interface GigabitEthernet0/1 Router(config-if)#access-group 100 in
D Router(config)#access-list 100 seq 5 permit ip host 172.20.10.1 any log Router(config)#interface GigabitEthernet0/1 Router(config-if)#access-group 100 in
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