Which method should an administrator use to add Centralized Logging to a vCloud Director cell?

Which method should an administrator use to add Centralized Logging to a vCloud Director cell?
A. Modify the $VCLOUD_HOME/etc/log4j.properties to include the Syslog Server information.
B. Set the Syslog Server address in the vCloud UI.
C. Modify the $VCLOUD_HOME/etc/system.properties to include the Syslog Server information.
D. Modify the Syslog Server with the vCloud Director Server’s address.