Concept:Separation of powers divides the work of government among three arms: the Executive (carries out laws), the Legislature (makes laws) and the Judiciary (interprets laws).Solution:Because no single person or arm holds all the powers, and each arm checks the others (checks and balances), one arm cannot easily abuse power.Rule of law means everyone is equal before the law; it supports good governance, but the principle built specifically to stop the concentration and abuse of power is separation of powers. Executive veto and parliamentary immunity are powers or privileges, not principles for checking abuse.Answer:Option B (Separation of powers)