When setting up SaaS applications within the Application Gallery, it is best to take which of the following steps?

A) Set up the program by clicking the URL on the vendors application page.
B) Set up the program before you connect to your users in Azure Active Directory.
C) Add your users to the Azure Active Directory before you add your application.
D) Start by using the product trial to start; if you like it, you can pay to continue your subscriptions; if not, you can remove it from your Azure Active Directory.
E) All of the above

E) All of the above