Which of the Following Is NOT True Regarding Form Button

Which of the following is NOT true regarding form button?

A) If necessary,forms and reports may be deleted from a navigation form.
B) An alternate method to delete the tab is to select the tab,right-click,and then select Delete from the dialog box.
C) Forms and reports can be easily added to the form by dragging the object from the Navigation Pane to the [Add New] button.
D) Existing buttons can easily be rearranged on their level,or they can be moved from one level of the form to another.