Which Statement About Port Isolation Configuration Is False

Which statement about port isolation configuration is false?

A) Port isolation can be used for Layer 2 isolation.
B) In port isolation mode, ports are isolated at Layer 2 but can communicate at Layer 3 by default.
C) Before the port isolation function takes effect on an interface, the port isolation function must be enabled first.
D) The port-isolate enable command can run in the system view.