Checks and balances is a system were the goverment checks the other two braches of goverment, and balance them out. so if the execuative branch gets to much power, the judicial and legislative branches bump down the power of it.
A and B are both key characteristics. So is C, but it is important to note that although most women formed the chorus, men also did sing. D is untrue, as Greeks often watched tragic plays, which although weren't specifically to make them sad, they were expected to feel catharsis (pity and fear) so that they could then purify themselves to renew and restore their emotions and themselves.
I believe the answer to this is Plessy v Ferguson. <span />
The internment of people of Japanese descent in America during WWII was caused by two things. First, it was caused by a very understandable fear for the security of the country. Japan had managed to pull off the attack on Pearl Harbor, which no one had thought was possible.
