What do you do to accomplish this?

Refer to the Exhibit.

All ISP networks shown in the exhibit contain many BGP speaking routers. You are in charge of
ISP A. You must ensure that customer Y sends their traffic to you over the directly connected link
but customer Y is not used for transit into your network. What do you do to accomplish this?

A.
Advertise routes to customer Y with a higher MED than routes advertised to customer X.

B.
Advertise routes to customer Y with the well-known no-advertise community.

C.
Advertise routes to customer Y with your AS number prepended four times.

D.
Advertise routes to customer Y with the well-known no-export community.

Explanation: