What are two reasons it made sense to set up a federal government with delegated powers?

Delegated powers are those powers that are specifically outlined in the Constitution. These powers outline the things that Congress can do, as well as define what Congress is in charge of regulating. Two reasons why delegated powers are important are:

nafta and the union are used as a trade between other countries these   organizations are used as spokes person for the country

answer should be c..