You administer a Microsoft SQL Server 2005 Reporting Services (SSRS) instance.
The instance has the following features:
-Deployed as a single server
-Configured to use Native mode
-A custom data extension developed by using Microsoft .NET Framework 2.0

You plan to upgrade the instance to SQL Server 2008 Reporting Services. You need to upgrade the instance without loss of functionality.
What should you do?

A.
Uninstall Internet Information Services (IIS).

B.
Upgrade the data extension to .NET Framework 3.5.

C.
Edit the RSWebapplication.config file to refer to the upgraded SSRS endpoint location.

D.
Install a new instance of SSRS. Migrate the existing configuration files and database to the new instance.

Explanation:
Tip: "Native mode … without loss of functionality" = "new instance"