Answer:
The statement that gets closest to what popular sovereignity means is the third: Popular sovereignty is the idea that a country's leader rules by permission of a majority of that country's citizens.
Step-by-step explanation:
Popular sovereignty means that the people have the power. It means that people, as a people, that is, thousands of individuals together that are thus more than just the sum of themselves, have the power to decide about the organization and government of them.
The people have a power that comes from their acting together. It's this power, and this power only, that concedes that a leader governs.