Which of the following configurations regarding default route configuration is correct?
A. [Quidway] ip route-static 0.0.0.0 0.0.0.0 172.16.2.1
B. [Quidway] ip route-static 0.0.0.0 255.255.255.255 172.16.2.1
C. [Quidway-GigabitEthernet0/0/1] ip route-static 0.0.0.0 0.0.0.0 172.16.2.1
D. [Quidway] ip route static 0.0.0.0 0.0.0.0 172.16.2.1