问题：

[单选]

You are the desktop administrator for ExamSheet. All users have Windows 2000 Professional computers. Users in thesalesdepartment have portable computers. The portable computers are used to create customer presentations and perform onlineordering. Sales representatives want to be able to use large external monitors to display their presentations at customer locations. These users also want to use the displays on the portable computers to show their speaker notes and extra data. 
You verify that the video adapters in the portable computers support multiple monitor and dual-view capabilities. However, thesalesrepresentatives report that when they attach the external monitors to their computers, the option to define separate desktop displays does not appear in the Display settings. 
You need to enable thesalesrepresentatives to display multiple desktops. What should you do?（）

A . Obtain and install an updated driver from the video adapter manufacturer.
B . Instruct thesalesrepresentatives to disable all hardware video acceleration during their presentations.
C . Configure the monitors on thesalesrepresentatives’ computers to use the Presentation power scheme.
D . Create a monitor profile on thesalesrepresentatives’ computers for the external monitors at the     customer sites.