Sovereignty, is the broad concept that refers to the right and ability of a nation to govern itself and make decisions regarding its citizens (A). Popular sovereignty is more strongly associated with a democratic principle of self governance, which is a possible answer but "sovereignty" in and of itself is probably the best answer to the question.
The Judicial Branch, or the federal court system, interprets the law.
The number of representatives a state gets is based on the population number in that state
<span>The correct answer for this question is C - If I worked for a government agency that regulated the buying and selling in the country, I would be serving the governmental purpose which refers to the distribution of resources.</span>
It seems like B is the most likely answer, considering it's really the only one that applies to democracy.