There are six statements A, B, C, D, E, and F in a database, but the database is not coordinated at present, and some statements must be deleted to restore the coordination of the database  Known: (1) If statement A is kept, then statement B and statement C must be kept  (2) If statement E is kept, both statement D and statement C must be deleted  (3) If statement E is kept, statement F can be kept
(4) Statement A is important information and cannot be deleted
Both statement E and statement F are deleted.