The existence of delegated legislation
The correct answer is: D
Explanation
Delegated legislation refers to laws made by an executive authority under powers granted by a primary or parent legislation. It allows for the executive to make rules and regulations without the full involvement of the legislature. This process can potentially undermine the principle of separation of powers, as it concentrates legislative power in the hands of the executive. Although delegated legislation can help the executive manage the complexities of law implementation, it might erode the checks and balances that come with a clear division of powers between the branches of government.