Who excutes law please tell me

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 was the main purpose of one of the first world organizations

Alimitation on the president’s power to appoint ambassadors is that