Final answer:
To initiate the shutdown of all nodes in an Azure Stack Hub integrated system, use the Azure Stack Hub Administrator Portal. The correct answer is D.
Step-by-step explanation:
To gracefully shut down all nodes of an Azure Stack Hub integrated system, you should use the Azure Stack Hub Administrator Portal (D). The Azure Stack Hub Administrator Portal provides a graphical user interface (GUI) that allows you to manage and operate your Azure Stack Hub environment. Through the portal, you can initiate the shutdown process for all nodes in the system.
For a graceful shutdown of all nodes in an Azure Stack Hub Integrated System, the Azure Stack Hub Administrator Portal should be used.
To gracefully shut down all nodes of an Azure Stack Hub Integrated System, the appropriate interface to initiate the shutdown is the Azure Stack Hub Administrator Portal. Although other tools like Azure Portal, Azure PowerShell, and Azure CLI offer management capabilities for Azure services, the Azure Stack Hub is a distinct environment that requires the use of its dedicated administrator portal for system-level operations such as shutting down nodes in a controlled manner.