An activist is protesting against his government. he is angry that the government is controlled by a king who inherited his power from his father. the activist demands that citizens be given the right to select their leaders. which of these ideas does the activist support?
a. separation of powers
b. popular sovereignty
c. constitutional monarchy
d. rule of law

The activist supports the popular sovereignty. Option B is correct.

Popular sovereignty refers to the principle that the authority of a state and its government are created and sustained by the consent of its people. In order to that, they elect their representatives (Rule by the People), who is the source of all political power. In other words, popular sovereignty refers to a political doctrine that the people living in a region should be entitled to determine for themselves the nature of their government.