A risk map, also known as a risk heat map, is a visual tool that helps an enterprise prioritize risk scenarios by plotting them on a matrix based on their likelihood and impact. A risk map can help to compare and contrast different risk scenarios, as well as to identify the most critical and urgent risks that require attention. A risk map can also help to communicate and report the risk profile and status to the stakeholders and decision makers. Therefore, the placement on the risk map would best help an enterprise prioritize risk scenarios. The other options are not the best ways to help an enterprise prioritize risk scenarios, although they may be relevant and useful. Industry best practices are the standards or guidelines that are widely accepted and followed by the organizations in a specific industry or domain. Industry best practices can help to benchmark and improve the risk management process and performance, but they may not reflect the specific risk context and needs of the enterprise. Degree of variances in the risk is the measure of the variability or uncertainty of the risk, which may affect the accuracy or reliability of the risk assessment and response. Degree of variances in the risk can help to adjust and refine the risk analysis and treatment, but it may not indicate the priority or importance of the risk. Cost of risk mitigation is the amount of resources or expenses that are required or allocated to implement the risk response actions, such as avoiding, transferring, mitigating, or accepting the risk. Cost of risk mitigation can help to evaluate and optimize the risk response options, but it may not determine the priority or urgency of the risk. References = CRISC Review Manual, pages 38-391; CRISC Review Questions, Answers & Explanations Manual, page 892