__ is not located in the system unit Select one: a. CPU b. FAN c. ROM d. CD

The correct answer is d. CD. The CPU (Central Processing Unit), FAN (Fan), and ROM (Read-Only Memory) are all components located within the system unit of a computer. The CD (Compact Disc) drive, however, is typically an external device that is connected to the computer via USB or other interfaces and is not housed within the system unit.