Your network has client computers that run Windows 7. A custom Web-based application requires specific
security settings. You need to prevent users from permanently modifying their Internet Explorer browsers
security settings.
What should you do?

A.
Reset the Internet Explorer settings

B.
Restore the advanced settings in Internet Explorer

C.
Use Windows Internet Explorer Maintenance (IEM) extension settings in Preference mode

D.
Use Windows Internet Explorer Maintenance (IEM) extension settings in Normal mode

Explanation:
Normal mode, you can configure IEM settings so thatthey are refreshed on users’ computers on a periodic
basis (or each time the users log in). However, users can temporarily change these settings between the times
scheduled for their setting refresh. For this reason, these settings in Normal mode behave as “pseudo-policies.”
In Preference mode, you can configure IEM settings,but allow users to change these settings later by using the
Internet Explorer 9 user interface.
http://technet.microsoft.com/en-us/library/gg699413.aspx