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

• A、Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface
• B、Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
• C、Configure many sub-interfaces on the same subnet
• D、Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces