Final answer:
The CPU clock speed cannot be set through CMOS setup.
Step-by-step explanation:
The correct answer is d) CPU clock speed.
The CMOS setup, also known as the BIOS setup, allows users to configure various settings on their computer system. However, the CPU clock speed is not one of the settings that can be changed through the CMOS setup.
Changing the boot device order allows users to specify the order in which the computer searches for a bootable device when starting up. The date and time can be set to ensure accurate timekeeping on the system. The display resolution determines the number of pixels displayed on the screen, affecting the clarity and quality of the visuals.