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 browser’s security settings.   What should you do？（）

• A、Use Windows Internet Explorer Maintenance （IEM） extension settings in Preference mode.
• B、Use Windows Internet Explorer Maintenance （IEM） extension settings in Normal mode.
• C、Reset the Internet Explorer settings.
• D、Restore the advanced settings in Internet Explorer.