Which handler controls which user fields appear when adding a user to a group?

• A. GroupsOnPicker
• B. UsersOnPicker
• C. MattersOnPicker
• D. ClientsOnPicker

Answer: (B)

When you’re adding a user to a group, the picker shown is a user picker, and the fields displayed in that picker are determined by the handler that manages users. That handler is the one called UsersOnPicker. It defines which user-related fields (like username, email, roles) appear when you select users to add to the group. The other handlers correspond to different pickers for other entities: GroupsOnPicker for groups, MattersOnPicker for matters, and ClientsOnPicker for clients. So the correct choice is the user-focused picker handler because it directly controls the user fields shown in this context.