Final answer:
The difference between Athenian direct democracy and the Roman Republic was that all eligible Athenian citizens could participate directly in government, while in Rome, initially, only the patrician elite held significant political power.
Step-by-step explanation:
The most accurate statement that explains the differences between the democracy of the Athenian polis and the structure of the Roman Republic is A) In the Athenian polis, all citizens had the right to vote and participate in the government, while in the Roman Republic, only a select group of elite citizens, known as the patricians, had significant political power.
In ancient Athens, we observe a direct democracy, where all eligible citizens could directly participate in the decision-making process. Participation in the Athenian Assembly was open to all free, male, landowning citizens, which historians estimate numbered between 30,000 and 50,000. However, not all individuals living in Athens had the right to vote; women, slaves, and foreigners were excluded. The Assembly made all decisions regarding war, treaties, laws, and had substantial power over executive matters.
In contrast, the Roman Republic operated as a representative democracy called a republic. Only patricians, the aristocratic elite, could initially hold public office and participate in the Roman Senate. Although plebeians, the common people, fought for and slowly gained more political rights over time, the early Republic was characterized by a division of power weighted heavily in favor of the patrician class.