Afederal system of government has
o a.
free and fair elections
b.
a written constitution
oc. socialization through education
od. layers of government

The right answer is "all of the above."

Explanation:

Look at the United States. It´s a country with a federal system of government. It shows the four characteristics listed here.  Another examples are Brazil and Germany. They also have federal systems  and meet all those requirements.

answer; rational if melanie values sleep more highly than the benefits she expects to receive from attending the class;