You are configuring your edge routers interface with a public IP (CCNA 200-301)

Correct answer: D) ip address dhcp.
To configure your edge router's interface with a public IP address for Internet connectivity and obtain the IP address from the service provider dynamically, you would use the command ip address dhcp. This command is essential for setting up the interface to automatically receive an IP address through DHCP (Dynamic Host Configuration Protocol). DHCP is a network management protocol used on IP networks where a DHCP server dynamically assigns an IP address and other network configuration parameters to each device on the network, so they can communicate with other IP networks. This process simplifies the configuration of IP addresses on devices, as it eliminates the need for manual IP address configuration. By using ip address dhcp, you're instructing the router to request an IP address from the DHCP server provided by your service provider, ensuring that your router can communicate with the Internet.