You are the administrator of the ExamSheet.net Windows 2000 domain. Users in the domain run Windows 2000 Professional on their desktop computers.  One hundred users whose user and computer accounts are in the Sales organizational unit (OU), report that their mouse is not working correctly. One of the computers having the mouse problem is named Computer1. You log on to Computer1 by using the domain Administrator account. You use Device Manager to display the current information for the mouse driver. You discover that Computer1 is using an older version of the mouse driver. You have an upgrade for the driver provided by the manufacturer of the mouse. Another administrator installs the upgrade for the driver by using Device Manager and restarts the computer. You test the mouse and it is still not functioning correctly. You view Device Manager and notice that the display of the current driver indicates that the previous driver is still installed. You want to be able to install the upgrade for the mouse driver on the affected computers by using the least amount of administrative effort.  What should you do?（）

• A、Configure the Unsigned driver behavior Local Security policy setting on each computer to Silently succeed. 
• B、Create a new Group Policy object (GPO) that configures the Unsigned driver behavior Local Security policy setting to Warn but allow installation. Link the GPO to the Sales OU and move  the link to the top of the GPO link list. 
• C、Disable Plug and Play on each computer. Restart each computer and reinstall the upgrade for the driver. 
• D、Log on to each computer by using the local Administrator account and reinstall the upgrade for     the new driver.