Which of the following are correct about configuring the firewall security zone? (Multiple Choice)

Which of the following are correct about configuring the firewall security zone? (Multiple Choice)
A . The firewall has four security zones by default, and the four security zone priorities do not support modification.
B . Firewall can have 12 security zones at most.
C . The firewall can create two security zones of the same priority
D . When data flows between different security zones, the device security check is triggered and the corresponding security policy is implemented.

Answer: AD