You configure parental controls on your computer for your childs user account. Your child logs on with a different account and is able to access inappropriate Web sites. You need to ensure that your child cannot access inappropriate Web sites.  What should you do？ （）

• A、Enable Microsoft Windows Firewall.
• B、Disable the default administrator account.
• C、Use password protection for all user accounts.
• D、Configure Web sites you approve of in the list of Trusted Sites of Microsoft Windows Internet Explorer.