What should you configure on Gateway1?

You have an Azure subscription that contains the resources shown in the following table.

Gateway1 provides access to App1 by using a URL of http://app1.contoso.com.

You create a new web app named App2.

You need to configure Gateway1 to enable minimize administrative effort.

What should you configure on Gateway1?
A . a backend pool and a routing
B. a listener and a routing rule
C. a listener, a backend pool, and a rule
D. a listener and a backend pool

Answer: B