A country's government has a king who creates and executes all of its laws. However, it also has a constitution that places some limits on what kinds of laws the king is allowed to create. A Supreme Court determines whether or not a king's law violates the constitution. If it does, the Supreme Court has the power to eliminate the law regardless of the king's opinion. This political system is based on which of these ideas?

A. Liberalism
B. Absolute monarchy
C. Separation of powers
D. Popular sovereignty