Refer to the exhibit. Service provider ACME Internet just added a 100 GB/s peering in Paris that it wants to use by default for outbound traffic to Big ISP. Which routing policy achieves the desired…

LOCAL_PREF is an iBGP attribute used to influence outbound traffic selection within an autonomous system - higher LOCAL_PREF values are preferred over lower ones. By setting a higher LOCAL_PREF on routes learned via the new Paris peering, all iBGP routers in ACME's network will consistently prefer the Paris exit point for traffic destined to Big ISP. This is the standard BGP mechanism for controlling outbound traffic policy across multiple exit points within a single AS.

Weight is a Cisco-proprietary attribute that is local to a single router and is not propagated via iBGP, so it cannot coordinate outbound path preference across the entire ACME network.

MED (Multi-Exit Discriminator) is advertised to neighboring ASes to influence how they send inbound traffic into your AS, not a mechanism to control your own outbound traffic preference.

Filtering prefixes longer than /24 in Brussels and Zurich would limit reachability by discarding more-specific routes but would not establish a preference for the Paris peering for outbound traffic.