Read this prompt for an argumentative essay.

In each state, citizens elect state senators who vote on important issues, including education, transportation, and workplace safety. Americans gain the right to vote at age 18. At that time, citizens are strongly encouraged to vote. However, they are not required to vote. Should voting be mandatory at the state level? Write an argumentative essay to address this issue.

The topic of the essay is

the minimum voting age.
a compulsory voting law.
the work of state senators.
state law versus federal law.