单选题
用基本的访问控制列表禁止非法地址172.168.0.0/16的数据包进出路由器的正确的ACL配置是（）。
问题1选项
A.[RouterA]acl number 2000 [RouterA-acl-basic-2000]rule 0 deny 172.168.0.0 0.0.255.255
B.[RouterA]acl number 2000 [RouterA-acl-basic-2000]rule 0 permit source 172.168.0.0 0.0.255.255
C.[RouterA]acl number 3000 [RouterA-acl-basic-2000]rule 0 deny source 172.168.0.0 0.0.255.255
D.[RouterA]acl number 2000 [RouterA-acl-basic-2000]rule 0 deny source 172.168.0.0 0.0.255.255
A.[RouterA]acl number 2000 [RouterA-acl-basic-2000]rule 0 deny 172.168.0.0 0.0.255.255
B.[RouterA]acl number 2000 [RouterA-acl-basic-2000]rule 0 permit source 172.168.0.0 0.0.255.255
C.[RouterA]acl number 3000 [RouterA-acl-basic-2000]rule 0 deny source 172.168.0.0 0.0.255.255
D.[RouterA]acl number 2000 [RouterA-acl-basic-2000]rule 0 deny source 172.168.0.0 0.0.255.255
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