Which basic principle of the constitution implies that if the people do not like what the government is doing they can change it?
a. checks and balances
b. judicial review
c. popular sovereignty
d. separation of powers

This is called: popular sovereignty.

 "Checks and Balances" is a concept connected to the separation of powers: a separation between the judicial, legislative and the executive power. The concept of Judicial review is also connected to this ides: this is the power of the Judicial branch of the government to check on the other two. 

Require the nobles and clergy to pay taxes.