Abehavior modification system in which individuals set up their own rewards and punishments to change behavior

How did the government of ancient athens differ from that of the early romans? (5 point) in athens, citizens voted for representatives who voted on issues, while in rome, citizens voted directly on issues. in athens, citizens voted directly on issues, while in rome, citizens voted for representatives who voted on issues. in athens, the government was ruled by a small group of powerful people, while in rome, the government was ruled by kings. in athens, the government was ruled by kings, while in rome, the government was ruled by a small group of powerful people.

What words in the preamble to the constitution reflect the principle of popular sovereignty

The american public was excited by the invention of the railroad system. true false