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

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

Answer: (C)

The GroupsOnPicker handler controls which group fields appear when adding groups for a user. This handler is dedicated to groups, so it determines the list of available groups and the related fields shown in the group selection UI for that user. The other handlers govern their own domains—UsersOnPicker for user-related fields, MattersOnPicker for matter-related fields, and WorkspacesOnPicker for workspace-related fields—so they don’t affect the group-adding screen. Therefore, GroupsOnPicker is the correct choice.