Answer:
Correct answer is direct democracy.
Step-by-step explanation:
Ancient Athens had direct democracy because people of Athens were directly bringing decision in the country, through political bodies they have established. The most important one was Assembly (Ecclesia).
All other options are wrong.
Socialism didn't exist back then. Dictators would be thrown out through the process of Ostracism. Last monarch in Athens in Codro was removed from his position.