You create and publish a new Azure App Service web app. User authentication and authorization must use Azure Active Directory (Azure AD). You need to configure ...

You create and publish a new Azure App Service web app.
User authentication and authorization must use Azure Active Directory (Azure AD).
You need to configure authentication and authorization.
What should you do first?

A. Add an identity provider. B. Map an existing custom DNS name. C. Create and configure a new app setting. D. Add a private certificate. E. Create and configure a managed identity.