Regulating interstate commerce is a duty of which level of government?

Federal Government regulates the interstate commerce. It refers to the procurement or sale of any merchandise within the states or in between the states is regulated by the states government.  

Federal Government is declared to regulate the interstates commerce and trade as specified in the constitution. Interstate trade was controlled by Interstate commerce commission which organized interstate trucking, Shipments and transportation of goods through freeways.  

Later, this control is transferred to the Federal Department called Transportation Department after the Sherman Act.

the right answer is the end of world war ii

after the end of a global wwii all the nations involved, in an attempt to create an organization to maintain world peace. this agreement would work settling international disputes via negotiation and arbitration instead of leading the issues escalate to another war.

i think that the answer is polishing peanuts