
Passage: 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.
Question: If all of the above are true, which of the followings must be true?
A. A.Statement E is kept and statement C is deleted.
B. B.Both Statement C and Statement D are kept.
C. C.Statement E is kept and statement D is deleted.
D. D.Both statement E and statement F are deleted.
Answer: