What's the difference between the traditional open field system and Lord Tonshend's crop rotation?

With an american government question

How does federalism limit the power of government in the united states? a. it requires the national government to share power with state governments. b. it ensures that one state cannot make laws that affect all the other states. c. it requires the three branches of the national government to share powers. d. it allows the judicial branch to rule on laws that affect the entire country.

What are the qualifications to be a member of the house of representatives