A technician installs a new video card in a desktop with onboard video. The technician boots the unit but sees no display. The monitor power light is on and the OS seems to be loading. Which ofthe following is the MOST likely cause?（）

• A、The display is defective.
• B、The video card needs to be flashed.
• C、The internal adapter has not been disabled.
• D、The new video card is defective.