Explanation/Reference:
Explanation:
B because BR1 is the router that has to advertise the loopback to his neighbors but if it is only receiving routes (no stub receive-only) It cannot advertise his loopback.
"eigrp stub recieve-only" will restrict the router from sharing any of its routes, meaning: connected, summary, redistributed or static routes to any other router in the EIGRP AS. Learned eigrp routes will never be shared as that would defeat the whole purpose of STUB.
There are other stub options that can be configured. The list looks like this:
- receive-only
- connected
- static
- summary
- redistribute
If you configure the receive-only option, you can't include any of the other options on the above list. If you just configure the router as a stub and don't specify any option, the default behavior is to share connected and summary routes. Some other caveats also arise when using these options. For instance, if you configure the static option, you still must allow EIGRP to share the static routes by issuing the redistribute static command in the config-router context, or the router won't share the routes. The same goes for the connected option. If a network statement does not include the connected routes you want to share, then you must issue the redistribute connected command. One last aspect which may seem counterintuitive is that if you use the redistribute option, you are permitting the router to share redistributed routes, but you still must actually redistribute the routes for them to be shared. If you choose the summary option, don't forget to either manually create summary routes or enable auto-summary.