The best risk response for an identified high probability risk scenario involving a critical, proprietary business function with an annualized cost of control higher than the annual loss expectancy is to accept the risk.
Accepting the risk means acknowledging the risk but choosing not to take any specific action to address it.
This strategy is suitable when the cost of implementing controls exceeds the potential loss, as in this scenario.
The organization recognizes the risk, but the cost-benefit analysis suggests that the potential loss is acceptable given the higher cost of control. The other options are not the best risk responses, as they may not befeasible, practical, or cost-effective in this scenario. Mitigating the risk means reducing the risk by implementing controls or measures to minimize its potential impact, but this would increase the cost of control, which is already higher than the annual loss expectancy. Transferring the risk means shifting the risk to another party, typically through insurance or contracts, but this may not be possible or advisable for a critical, proprietary business function, and it may also increase the overall cost burden. Avoiding the risk means eliminating the risk entirely by not engaging in the activity that poses the risk, but this may disrupt essential business operations and potentially result in other adverse consequences. References = CRISC Exam:Best Risk Response for High Probability Risk Scenario; Risk Response Plan in Project Management: Key Strategies & Tips; Chapter 19: Summarizing Risk Management Concepts