Port Isolation Provides Secure and Flexible Networking Solutions for Users

Port isolation provides secure and flexible networking solutions for users. Which of the following statements regarding port isolation is false?

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