Papers involving national military, political or economic secrets are not part of a public dissertation. If the above assertion is true, Which of the following items must also be true. ['Papers that do not involve national military, political or economic secrets cannot be made public.', 'Non-public dissertations are all about national military, political or economic secrets.', 'Some papers involving national military, political or economic secrets can be made public.', 'None of the public dissertations are those involving national military, political, or economic secrets.']