Which of the following BEST protects evidence in a forensic investigation?

Protecting the hardware is important for physical security but does not prevent alteration or loss of digital evidence on the system itself.

Powering down the affected system can lead to the loss of volatile memory (RAM) and running processes, which often contain critical evidence, thus it is usually not the first step.

Imaging the affected system involves creating a bit-for-bit copy of the storage media, which is crucial because it preserves the original evidence in its pristine state. This allows investigators to analyze a copy without altering the original, maintaining the integrity and admissibility of the evidence in legal proceedings.

Rebooting the affected system changes the system state, overwrites temporary data, and can potentially erase critical volatile evidence, making it highly detrimental to a forensic investigation.