Refer to the exhibit. Which task completes the configuration?

Specifying the maximum number of prefixes is a control measure to prevent issues, not a fundamental step to complete basic BGP peering and route exchange.

While `update-source` is good practice for BGP neighbor stability, especially when peering over loopbacks, it is not strictly necessary to complete the basic peering if the source interface can be inferred.

Even after defining a BGP neighbor globally, it must be explicitly activated within the relevant address family (e.g., `address-family ipv4`) to enable it to exchange routes for that specific IP version and type.

Specifying a `local-as` value is typically used for AS-path manipulation in specific scenarios like private AS removal or AS override, not for the basic completion of a BGP peering session.