Refer to the exhibit. A public IPv6 address must be configured for internet access. Which command must be configured on the R2 WAN interface to the service provider?

The `fe80::/10` prefix designates a link-local address, which is only valid on the local link and not routable over the internet for public access.

While appearing as a global unicast address, the `2001:db8::/32` range is reserved for documentation and example purposes, not for actual public internet assignment, and the `anycast` keyword implies a specific use case not generally for a primary WAN interface.

This command assigns a global unicast IPv6 address from the `2001:db8::/32` documentation range (commonly used in exams to represent public addresses) with a /64 prefix to the interface, which is the correct type and format for internet accessibility.

The `fe80::` prefix and the `link-local` keyword explicitly identify this as a link-local address, which is non-routable beyond the local segment and cannot provide internet access.