In the switching network shown in the figure, VLAN10 is set as lsolate-user-vlan VLAN2 and VLAN3 as the Secondary VLAN of VLAN 10 on switch SWA; VLAN2-VLAN20 is created on switch SWB, and VLAN20 is set as lsolate-user-vlan, and VLAN4 is the Secondary VLAN of VLAN20. After setting the IP addresses of each device as shown in the figure, which of the following statements are correct?

A . PCA’s message enters from SWA’s GigabitEther1/0/1 port and exits from GigabitEther1/0/3 port without VLAN Tag.
B . PCA’s message comes out from SWA’s GigabitEthem1/0/3 port and enters SWB’s GigabitEthe1/0/3 port. The VLAN tag it carries is VLAN2.
C . When SWB accesses PCA, the VLAN tag of the message from SWB’s GigabitEthem1/0/4 is VLAN 1.
D . SWB’s message enters from SWA’s GigabitEthem1/0/3 port, and the VLAN tag it carries after exiting from GigabitEthem1/0/1 port is VLAN2

Answer: A