What were tribute empires?
A) powerful empires that accepted tributes from states in return for protection
B) empires that were honored by other states for their abilities in warfare
C) early civilizations in Asia, Europe, and the Americas whose religious were based on classical religions of China or
D) any empire that was not classified as one of the classical American civilizations

Question

What were tribute empires? 
A) powerful empires that accepted tributes from states in return for protection
B) empires that were honored by other states for their abilities in warfare
C) early civilizations in Asia, Europe, and the Americas whose religious were based on classical religions of China              or 
D) any empire that was not classified as one of the classical American civilizations