Assuming that other configurations are complete and correct, what is the problem with this configuration in actual work?

The networking of a certain network is as follows: PC—-ADSL router—–USG—–LAN

The key configurations of the USG are as follows:

l2tp enable

interface Virtual-Template1

ppp authentication-mode pap

ip address 4.1.1.1 255.255.255.0

remote address pool 1

l2tp-group 1

mandatory-Icp

allow 12tp virtual-template 1

#

user-ma page user pc1

password admin@123

aaa

domain default

ip pool 1 4.1.1.1 4.1.1.99

Assuming that other configurations are complete and correct, what is the problem with this configuration in actual work?
A . You can dial successfully, and you can also access the intranet server.
B. Cannot dial successfully.
C. Disconnect immediately after successful dialing.
D. The dial-up is successful, but the intranet server cannot be accessed.