In BGP, the Multi-Exit Discriminator (MED) attribute is used to inform external neighbors about the preferred path into an AS when multiple entry points exist. A lower MED value is preferred over a higher one. Therefore, if RouterDAL advertises a route to the 10.0.0.0/24 network with a lower MED compared to RouterCHI, RouterSF will choose the route from RouterDAL. This is assuming all other attributes are equal and there is no more specific route or policy in place that would override the MED consideration.