What does altering the description on an existing tree node do?

A.
changes the description for that node (with no effective date) only on that tree

B.
creates an error message that the description of the tree nodes cannot be changed

C.
creates a new effective-dated row, which allows you to input a new description only for
that tree

D.
allows you to change the current description (or create a new effective-dated description),
which updates all trees that use this node