Which method will filter routes between EIGRP neighbors within the same autonomous system?

A distribute-list is the standard and most direct method used in EIGRP to filter incoming or outgoing route advertisements between neighbors within the same autonomous system, typically by referencing an access list or prefix list.

Policy-based routing (PBR) is used to influence the forwarding path of packets based on policies rather than routing table lookups, and it does not filter routing advertisements between neighbors.

A leak-map is a mechanism primarily used in OSPF to selectively re-advertise routes between areas, and it is not a direct method for filtering EIGRP routes between neighbors.

Route tagging is a mechanism to mark routes with specific attributes for later policy application or filtering, but it is not a method that performs the filtering itself; rather, it is used in conjunction with filtering tools like distribute-lists or route-maps.