Who was the Athenian leader who introduced a system of political reform in 507 B. C.?

The Cleisthenes

In the year 507 B.C., the Athenian leader Cleisthenes introduced a system of political reforms that he called demokratia, or “rule by the people” (from demos, “the people,” and kratos, or “power”). It was the first known democracy in the world.

Explanation:The so-called golden age of Athenian culture flourished under the leadership of Pericles (495-429 B.C.), a brilliant general, orator, patron of the arts and politician—”the first citizen” of democratic Athens, according to the historian Thucydides.

when   i did the assesment i chose c it was correct