A Datacenter Recently Experienced a Breach Committed by a Group

Multiple Choice

A datacenter recently experienced a breach committed by a group that was able to access a server that had been shut down but not disconnected from the network. Which of the following could have prevented the breach from occurring?

A) Disabling WOL in the server BIOS
B) Shutting down unneeded ports on the server
C) Installing anti-malware software on the server
D) Disabling non-essential services on the server