The correct response that highlights the primary difference between Ancient Greek democracy and the current democracy practiced in the United States is:
B Greek citizens participated directly in decision-making.
In Ancient Greece, particularly in Athens, democracy was characterized by direct participation of citizens in decision-making processes, where eligible citizens could vote on laws and policies themselves. In contrast, the United States practices a representative democracy, where citizens elect representatives to make decisions on their behalf.
Responses A, C, and D do not accurately describe Ancient Greek democracy. While ancient Athens had elements of checks and balances, it was not structured in the same way as the modern system in the United States, which explicitly defines the separation of powers among different branches of government.