Unconscionable is a precept in contract law which depicts the extremely immoral, oppressive, or unjust laws as obstructive to good conscience. These laws overwhelmingly favor one party of the contract due to its superiority in bargaining abilities.
As per the question, the provision of 'landlord's authority to cut off heat or water' in a residential lease exemplifies such immoral or outrageous laws that can outrage the sensibility or conscience of the courts and courts have the complete authority to refuse the enforcement of such unjust laws. Thus, <u>option D</u> is the correct answer.
