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