In terms of supporting a forensic investigation, it is now imperative that managers, first-responders, etc.

 Explanation:

Maintaining power ensures volatile memory (RAM) data is preserved, which can contain critical forensic evidence such as running processes and network connections.

Securing the area prevents tampering or unauthorized access, preserving the integrity of evidence.

 Why Other Options Are Incorrect:

A. Shut-down the computer: Shutting down can result in loss of volatile data critical to the investigation.

C. Place components in anti-static bags: Prematurely removing hardware disrupts the state of the machine and can lead to loss of evidence.

D. Secure the area: While important, it does not address the need to preserve volatile memory.

 EC-Council CISO Reference:

The first-responder guidelines stress the importance of preserving evidence integrity and avoiding actions that could destroy critical forensic data.