Final answer:
Chassis intrusion detection/notification is a computer case security feature that can be enabled in the BIOS settings, which helps in detecting when the case has been opened or tampered with.
Step-by-step explanation:
The feature being referenced in the question is chassis intrusion detection/notification, which is a security feature included in some computer cases. This feature can detect when the computer's case has been opened or tampered with. The correct answer to the question is B) Chassis intrusion detection/notification; enabled in BIOS. The BIOS (Basic Input/Output System) is firmware used to perform hardware initialization during the booting process and to provide runtime services for operating systems and programs. The feature can be enabled or disabled in the BIOS settings of the PC. It is not typically related to the CMOS, which is a small amount of memory on the motherboard that stores BIOS settings.