Which software should you install on Server2 to support the planned changes?

SQL Server 2012 Express might be used to host an MDT deployment database for dynamic configuration, but it is not the primary software for image creation, modification, or general deployment support.

Windows Deployment Services (WDS) is used for network-based deployment, but the Windows ADK is a prerequisite for creating and managing the boot images (like WinPE) and other components that WDS utilizes.

The Windows Assessment and Deployment Kit (Windows ADK) is a fundamental suite of tools, including WinPE (Windows Preinstallation Environment) and DISM (Deployment Image Servicing and Management), which are essential for tasks like creating, modifying, and deploying Windows images to support various planned deployment changes.

Microsoft .NET Framework 3.5 is a software framework required by many applications, including some components within the ADK itself, but it is not the core deployment and imaging toolkit needed to support planned deployment changes.