Why does federalism create tension between state and national governments?
a. both national and state governments share power.
b. state and local governments have no support for national governments.
c. states are not able to work with each other.
d. the national government dominates the states.

The answer to this question is (A) Both national and state governments share power.
In united states, both national and state government has the right to create their own laws. This often create tension because some times, the law that exist between the two contradicts one another, and the state government will be forced to bow down if such event happens.