The difference between the traditional open field system and Lord Townshend's crop rotation?

According to the video, two of the ways government can play a role in the economy is by protecting property rights and to

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.

Which of the following  bestillustrates a negative reinforcer?               a.  copland gives up candy to stave off chronic acid indigestion.    b.  nancy learns that she prefers chocolate over vanilla.    c.  carmine changes his major to english lit after failing a math exam.    d.  on a hot day, lindberg always drinks lemonade.