Which component can be configured to have a Hot Standby?

A.
Tivoli Enterprise Portal Server
B.
Tivoli Enterprise Monitoring Server (Hub)
C.
Tivoli Enterprise Monitoring Server (Remote)
D.
Tivoli Enterprise Monitoring Automation Server
Explanation:
http://www-
01.ibm.com/support/knowledgecenter/SSTFXA_6.2.0/com.ibm.itm.doc/itm_install44.htm%23
failover_deploy (See the table)