1. the united states has a federal system of government; what does that mean?

Federal system of government is a system in which power is divided between central and state governments.

Explanation:

In a federal government system, power is divided between a central national government and local state governments.

This means that according to the United States Constitution, certain powers are designated to a central government, and others are reserved for the state governments. However, certain powers are also shared by different government levels. For example, both the federal and state government are given the power to tax, but only the federal government is allowed to declare war.

the answer wold be b) travel among nations should be regulated by an international organization

i also think it is c