Ann, a user, reports that her computer was working this morning, but now the screen is blank. The power indicator for the monitor is on. Pressing the space bar or
mouse does not fix the problem. Which of the following is the cause?

A.
The monitor power cable is unplugged.

B.
The video cable has become disconnected.

C.
The video driver is not installed.

D.
The operating system has encountered a stop error.

E.
The screen saver has activated.