The accounting department has implemented thin clients and VDI. One of the users is complaining that each time she powers on her thin client, she has access only to a web browser. Which of the following is the most likely reason for this behavior? a. The user has been assigned a nonpersistent VDI account. b. The user's thin client does not have an operating system configured. c. The user has been assigned a persistent VDI account. d. The user has entered correct credentials to the VDI server. e. The user has not signed in to the VDI server with her user account and password