Choose the answer that evaluates the differences between the national government and local governments.

A: Local governments are primarily concerned with treaties, and the national government is primarily concerned with foreign affairs
B: The national government is primarily responsible for agenda setting, and local governments are primarily responsible for implementing policies
C: The national government is primarily concerned with education, and local governments are primarily concerned with defense
D: The national government is primarily concerned with foreign affairs, and local governments are primarily concerned with affairs of their communities