Lucas, a forensic investigator, encounters a laptop during his investigation that is locked with a...

Option D is the best answer because removing and reinserting the CMOS battery is a traditional hardware method used to reset stored motherboard configuration settings, including the BIOS password on some systems. CHFI v11 includes Booting Process , Windows Boot Process: BIOS-MBR Method and UEFI-GPT , and under tools it explicitly mentions a Tool to Reset Admin Password , showing that exam candidates are expected to understand system-access and startup-related recovery concepts.

The question is specifically about a BIOS password , not full-disk encryption or operating-system user credentials. Removing the CMOS battery does not decrypt the hard drive and does not normally bypass Windows or Linux user account passwords. Its purpose in this context is to clear or reset firmware-level settings maintained by the motherboard.

Option C is close in wording, but the more precise and intended answer is that the action is being used to reset the BIOS password itself. Therefore, under CHFI operating-system and boot-process concepts, the correct choice is D .