Final answer:
Cleisthenes, the Athenian leader, enabled the founding of democracy by turning to the people of Athens for decision-making and implementing reforms that allowed all male citizens to vote.
Step-by-step explanation:
When Cleisthenes was in charge of ancient Athens, he turned to the people to help make choices about what to do. This decision was pivotal in the founding of Athenian democracy in the late sixth century BCE. Cleisthenes appealed to the common people, the democracy, to overthrow these tyrants and reject the pro-Spartan regime established by the Spartans. He implemented reforms that included allowing all male citizens to vote in public matters and reorganizing Athenians into ten new tribes to unite people from different areas. These reforms are what led to Athens becoming the first "real" democracy in history. Hence, the correct answer is C. The People.