When configuring a routed port on a Cisco multilayer switch， which of these is a required configuration task that you must perform to enable that port to function as a routed port？ （）

• A、Enable the switch to participate in routing updates from external devices with the router command in global configuration mode.
• B、Enter the no switchport command to disable Layer 2 functionality at the interface level.
• C、Each port participating in routing of Layer 3 packets must have an IP routing protocol assigned on aperinterface level.
• D、Routing is enabled by default on a multilayer switch， so the port can become a Layer 3 routing interface by assigning the appropriate IP address and subnet information.