单选题 下面路由器是Huawei的部分输出配置,关于该部分配置描述正确的是:( ). [Huawei]bgp 100 [Huawei-bgp]peer 12.12.12.2 ip-prefix P1 export [Huawei]ip ip-prefix P1 index 5 deny 10.0.0.0 8 greater-equal 8 less-equal 32 [Huawei]ip ip-prefix P1 index 10 deny 172.16.0.0 12 greater-equal 8 less-equal 32 [Huawei]ip ip-prefix P1 index 15 deny 192.168.0.0 16 greater-equal 8 less-equal 32 [Huawei]ip ip-prefix P1 index 20 permit 0.0.0.0 8 less-equal 8 less-equal 32