You have an Azure subscription that is linked to an Azure Active Directory (Azure AD) tenant. From the Azure portal, you register an enterprise application. Which additional resource will be created in Azure AD? 

Answer options:

A. a service principal
B. an X.509 certificate
C. a managed identity
D. a user account

A

Reference: https://docs.microsoft.com/en-us/azure/active-directory/develop/active-directory-how-applications-are-added