单项选择题

A.ip route 172.20.1.128/25 10.1.1.1/30 GE0/4/1.20
B.ip route vrf VPN1 172.20.1.128/25 10.1.1.1/30 GE0/4/1.20
C.ip route vrf vpn1 172.20.1.128/25 10.1.1.2/30 GE0/4/1.20
D.ip route vrf VPN1 172.20.1.128/25 10.1.1.2/30 GE0/4/1.20