Te correct answer is D) Democracy.
The important political structures that originated in Greece during the classical era was Democracy.
Cleisthenes was the Athenian leader that introduced the concept of democracy or what he called "the rule of the citizens." He designed an effective system of government were citizens decided their rulers. The system was divided into the following parts. One part wrote the laws, other was a council that represented the tribes, and thefinal one was the concept of Courts to solve problems. This concept of government influenced modern countries with a similar structure of a President, a legislative branch, and a judicial branch.
