How will you go about securing a computer with a BIOS password?

How will you go about securing a computer with a BIOS password?

A.
Use the BIOS guest password to secure the CMOS settings within the BIOS.

B.
Use the BIOS local administrator password to secure the CMOS settings within the BIOS.

C.
Use the BIOS local user password to secure the CMOS settings within the BIOS.

D.
Use the BIOS access password to secure the CMOS settings within the BIOS.