Answer:D. Risk Avoidance.
Explanation:Risk Avoidance is a risk management strategy where the potential risk is identified and avoided. In Risk avoidance,the Organisation or person involved prevent or chooses not to take certain steps or actions that can predispose the Organisation or the person to that risk.
HAL system's decision on not continuing with the NTP services is a risk avoidance process, as it is aimed at avoiding or deciding not to continue with such services due to the potential risk involved.