SSL VPN authentication landing is not successful, and prompted "wrong user name or password", which option is wrong?

SSL VPN authentication landing is not successful, and prompted "wrong user name or password", which option is wrong?
A . User name and password input error.
B . User or group filter field configuration error.
C . The certificate filter field is incorrectly configured.
D . The administrator configured a policy that limits the source IP address of the terminal.

Answer: D