You plan to deploy several Azure virtual machines that will run Windows Server 2019 in a virtual machine scale set by using an Azure Resource Manager template. ...

You plan to deploy several Azure virtual machines that will run Windows Server 2019 in a virtual machine scale set by using an Azure Resource Manager template.
You need to ensure that NGINX is available on all the virtual machines after they are deployed.
What should you use?

A. the New-AzConfigurationAssignment cmdlet B. a Desired State Configuration (DSC) extension C. Azure Active Directory (Azure AD) Application Proxy D. Azure Application Insights