Hello Dear,
The answer is A
The FW has two types of virtual systems: public system (public) and virtual system (VSYS).
Public system (public)
The public system is a special virtual system on the FW and is available even if the virtual system function is disabled. After the virtual system function is enabled on the FW, the public system inherits all the configurations of the FW.
The public system manages other virtual systems and forwards data between them.
Virtual system (VSYS)
Virtual systems are independent logical systems created on a FW.