Definition: This is an action or thing that citizen is required to do by law.
Example: Examples include obeying laws and paying taxes
Term:

Mandatory Duties of U.S. ... U.S. citizens must comply with certain mandatory obligations, including: Obeying the law. Every U.S. citizen must obey federal, state and local laws, and pay the penalties that can be incurred when a law is broken. Paying taxes.

Explanation:

depending on what kind of map for example a pltical maps works in many ways this iss how it works it shows the areas and places the democratics and the repbulcicans reside for example if   texas chooses trump for president there a republican state and if   califronia chooses hillary there a democratic state.

i think it's b