单选题Which action is optional when adding an authentication realm for use on an Infranet Controller? （）A Modify sign-in policy.B Configure role mapping.C Assign authentication server.D Configure authentication policy.
题目
单选题
Which action is optional when adding an authentication realm for use on an Infranet Controller? （）
A
Modify sign-in policy.
B
Configure role mapping.
C
Assign authentication server.
D
Configure authentication policy.