Which two of the following statements describe a routed switch port on a multilayer switch？（）

• A、Layer 2 switching and Layer 3 routing are mutually supported.
• B、The port will not be associated with any VLAN.
• C、The routed switch port supports VLAN subinterfaces.
• D、The routed switch port is used when a switch has only one port per VLAN or subnet.
• E、The routed switch port ensures that STP remains in the forwarding state.