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:A
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.