Which two statements about devices within a Cisco ESA cluster are true? (Choose two.)
A. Clustered systems must consist of devices in the same hardware series.
B. Clustered devices can communicate via either SSH or Cluster Communication Service.
C. Clustered devices can communicate only with Cluster Communication Service.
D. In-the-cloud devices must be in a separate cluster from on-premise devices.
E. Clustered devices can run different versions of AsyncOS.
