How is Self Registration activated for a group space?

How is Self Registration activated for a group space?

A.
Select the appropriate option under the Self-Subscription selection on the General tab.

B.
Click the Activate Self Registration button on the General tab of the Group Space.

C.
Self Registration is not allowed.

D.
Self Registration is a tab under Spaces administration.

E.
Self Administration is a hidden area. To activate it, the WebCenter Spaces administrator has to
modify the user-access.xml file for that user.