Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:

Every time attribute A appears, it is matched with the same value of a

1.	Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that:
A.	A B.
B.	A C.
C.	A (B,C).
D.	(B,C) A.
Answer» B. A C.