Which two statements are true about Oracle Weblogic Clustering ？ （）

A、 WLS instances must be in a Cluster for In-Memory HTTP Session Replication to function  

B、 WLS supports only hardware load balancing to ensure HA access for HTTP/Web clients

C、 The servers must be running on the same port number

D、 Make sure your Admin Server configuration and related files reside on a HA file system or some other backup/recovery strategy is in place