Answer :
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.
Answer:
The two right answers are A. and B.
Most of them men did sing so its not C. and D. lot of the actors are dramatic and feeling sad has much drama.
hope this helped - <3