Consider a relation scheme R = (A, B, C, D, E, H) on which the following functional dependencies hold: {A–>B, BC–>D, E–>C, D–>A}. What are the candidate keys of R?

• A. AE, BE
• B. AE, BE, DE
• C. AEH, BEH, BCH
• D. AEH, BEH, DEH