单选题在一台Cisco路由器上封禁ICMP，只允许215.192.40.16/28和202.204.28.0/24子网的ICMP数据包通过路由器，下列正确的access-list配置是______。

A、 Router(config)#access-list 100 permit icmp 215.192.40.16 255.255.255.240 anyRouter(config)#access-list 100 permit icmp 202.204.28.0 255.255.255.0 anyRouter(config)#access-list 100 deny icmp any anyRouter(config)#access-list 100 permit ip any anyRouter(config)#
B、 Router(config)#access-list 98 permit icmp 215.192.40.16 0.0.0.15 anyRouter(config)#access-list 98 permit icmp 202.204.28.0 0.0.0.255 anyRouter(config)#access-list 98 deny icmp any anyRouter(config)#access-list 98 permit ip any anyRouter(config)#
C、 Router(config)#access-list 198 permit icmp 215.192.40.16 0.0.0.15 anyRouter(config)#access-list 198 permit icmp 202.204.28.0 0.0.0.255 anyRouter(config)#access-list 198 deny icmp any anyRouter(coiffig)#access-list 198 permit ip any anyRouter(config)#
D、 Router(config)#access-list 198 permit icmp 215.192.40.16 0.0.0.15 anyRouter(config)#access-list 198 permit icmp 202.204.28.0 0.0.0.255 anyRouter(config)#access-list 198 permit ip any anyRouter(config)#access-list 198 deny icmp any anyRouter(config)#

【正确答案】 C

【答案解析】