You want to start the managed server called managed1 in "Standby" mode, to keep it as a "hot backup". Which statement about your domain configuration must be true? 

Answer options:

A. The server managed1 must be of a cluster.
B. Your domain has an administration port.
C. Only the admin server can start in "Standby" mode.
D. There is no such thing as "Standby" mode.

B