【单选题】某网管员在配置去往172.28.110.0/24、172.28.111.0/24两个网络的路由时,考虑到这两个网络在路由器的同一个串口方向,所以写成一条汇总路由,下面哪个汇总路由的表示是正确的?( )
A.
ip route 172.28.110.0 255.255.255.0 s2/0
B.
ip route 172.28.111.0 255.255.255.0 s2/0
C.
ip route 172.28.110.0 255.255.254.0 s2/0
D.
ip route 172.28.111.0 255.255.254.0 s2/0