The message service performs the following tasks in the Java cluster:(More than one answers are true)

The message service performs the following tasks in the Java cluster:(More than one answers are true)
A . Guaranteed message transmission
B . The applications can lock objects are release locks again.
C . It manages the lock table in the main memory and receives requests for setting or releasing locks
D . Forwarding of messages and requests to all participants (broadcast)
E . Support for message server failover
F . Communication between different services

Answer: A,D,E,F