Who introduced direct democracy? the Vikings

the Greek city-state of Athens

the Romans

the Zhang dynasty

Oque provoca coroço no peito do homen?

President clinton, on the fortieth anniversary of the events in arkansas surrounding the "little rock nine," stated that "when the constitutional rights of our citizens are threatened, the national government must guarantee them." this principle was the basis for using federal authority in: the expansion of voting rights to women. the passage of the civil rights act of 1964. the passage of the americans with disabilities act. all of the choices.

Who did the first work in creating vaccines