Concept:Separation of power prevents the concentration of authority in one arm of government.
Explanation:The theory divides government powers among the executive, legislature, and judiciary.
Each arm operates independently and watches over the others through checks and balances.
This arrangement stops any single branch from becoming too powerful and abusive.
When power is balanced in this way, the rights and freedoms of citizens are safeguarded.
Thus, the main purpose is not to weaken the executive or favour the legislature.
It is also not aimed mainly at judicial efficiency.
Instead, the central goal is the protection of individual liberty from tyranny and arbitrary rule.
Answer:C. protect individual liberty