How should arouter that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?（）

Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface

Configure each Frame Relay circuit as apoint-to-point line to support multicast and broadcast traffic

Configure many sub-interfaces on the same subnet

Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces