A General Theory of Hegemonic Decline Proposes Which of the Following

A general theory of hegemonic decline proposes which of the following to be an important cause of hegemonic decline?

A) the hegemonic society begins favoring free trade policies, thereby providing opportunities for competitors
B) internal obstacles, such as declining productive activity, reduce the hegemon's ability to maintain its position as the number one power
C) competing economic powers "gang up" on the hegemon to weaken it
D) the high standard of living in the hegemonic society leads to inefficiencies in that society
E) all of these