Which users does the guest role apply?

Refer to the exhibit.

A network administrator sets up the Exam_Employees WLAN on an Aruba solution with a default role of guest, as shown in the exhibit. To which users does the guest role apply?
A. users who have connected to the SSID, but have not yet attempted authentication
B. users who successfully authenticate and are assigned to the default role by the RADIUS server
C. users who successfully authenticate and are not assigned a different role by the RADIUS server
D. users who fall authentication