Which statement is correct regarding administrator privileges?

Which statement is correct regarding administrator privileges?

A.
Any administrator can change their privileges on an as-needed basis.

B.
Administrator privileges can only be established and changed by the root administrator.

C.
Administrator privileges can be established and changed by the root and all-privilege
administrator.

D.
Administrator privileges can only be established by the root and can be changed by the
root and all-privilege administrator.