What Was One of Pericles' Most Important Democratic Innovations

What was one of Pericles' most important democratic innovations?

A) Allowing the children of long-term residents of Athens, who had contributed to the city-state's prosperity, to become citizens
B) Establishing a system whereby the five hundred ruling members of the council were chosen at random by lot and rotated annually
C) Establishing a free public education system open to the adolescent sons of all Athenian citizens
D) Providing a modest salary to any officeholder selected by lottery, thus enabling even poor men to serve as public officials