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 video driver is not installed.

B.
The operating system has encountered a stop error.

C.
The monitor power cable is unplugged.

D.
The screen saver has activated.

E.
The video cable has become disconnected.