The correct answer is A. Monarchy
Step-by-step explanation
The monarchy is a system of government that is characterized by the concentration of power in a single person, which is designated as king, monarch, pharaoh, among others. This system of government, in addition to giving all the power to a single person, allows him to create the laws and modify them to his liking, to be considered as an envoy of God or a superior being appointed to govern, and the power is inherited from the monarch to his descendants. In the case of Ancient Greece, it can be said that the government was a monarchy because it was hereditary. So, the correct answer is A. Monarchy.