This is a very complex question, but they both collapsed due to:
decentralization and government corruption
plagues/ epidemics
high taxes
and invasions
Some differences are that the Chinese empires saw a revival while Rome didn't.
Answer:
C) Barbarians
Explanation:
The term barbarian which comes from the Greek word ΒΑΡΒΑΡΟΣ - varvaros initially meant any non-Greek.
They usually traded these for slaves which were captured and sold to them.
Once it was signed, it places limits on the power of royalty, that means after it was signed the royals started playing the political game of trying to get their favorites in power instead of doing the Middle Ages equivalent of “you better or else”.
Answer:
In a CERTAIN sense defend. The dropping of the atomic bombs allowed WW2 to be ended quicker than the other option that was available. The other option was to invade Japan with a massive Allied land force which would of probably resulted in more casualties in both military/civilian than the atomic bombs.