Answer: An Internet-routable IP address (static) of the customer gateway's external interface for the on-premises network
Explanation:
Based on the information given, an Internet-routable IP address (static) of the customer gateway's external interface for the on-premises network need to be configured outside of the VPC for them to have a successful site-to-site VPN connection.
The Internet-routable IP address will be used in the identificatiob of each computer through the use of the Internet Protocol for the communication over a network.
Tell someone you're close to, and see what advice they have. It's best to ignore the person until then.
The only one of those I would trust is the site ending with EDU I hope this helps you.