The correct answer is E) constitutional law.
The legal principle that underlies the belief that governments must establish clear rules and legal principles is constitutional law.
Constitutional law includes the rights is the state and federal Constitution, as well as the rights of the citizens. Constitutional law includes the rights and powers of the United States federal branches: the executive, the legislative, and the judicial. In the case of the United States, the executive is the presidency, the legislative is the House of Representatives and the Senate, and the Judicial that is the US Supreme Court.
