A new help desk employee at a cloud services provider receives a call from a customer. The customer is unable to log into the provider’s web application database.
The help desk employee is unable to find the customer’s user account in the directory services console, but see the customer information in the application
database. The application does nit appear to have any fields for a password. The customer then remembers the password and is able to log in. The help desk
employee still does not see the user account in directory services. Which of the following is the MOST likely ?

A.
A bug has been discovered in the application

B.
An application uses a weak encryption cipher

C.
A federated authentication model is being used.

D.
The application uses single sign on.