Key performance indicators (KPIs) are metrics that measure the achievement of objectives and the effectiveness of processes. KPIs can help management report on risk by providing quantitative and qualitative information on the risk profile, the risk appetite, the risk response, and the risk outcomes. KPIs can also help monitor and communicate the progress and results of risk management activities, such as risk identification, assessment, mitigation, and reporting. KPIs can be aligned with the strategic, operational, and tactical goals of the organization, and can be tailored to the specific needs and expectations of different stakeholders. References = Risk and Information Systems Control Study Manual, Chapter 4: Risk and Control Monitoring and Reporting, Section 4.2: Key Risk Indicators and Key Performance Indicators, p. 197-199.

A risk practitioner should evaluate the relevance of the evolving threats to the organization's industry, as this is the best course of action to understand the current and future risk landscape, and to align the risk management strategy accordingly. By evaluating the relevance of the evolving threats, the risk practitioner can determine the impact and likelihood of the threats affecting the organization's objectives, assets, and processes, and prioritize the most critical and urgent risks. The risk practitioner can also identify the gaps and weaknesses in the existing controls, and recommend appropriate risk response measures to mitigate the threats. The other options are not as good as evaluating the relevance of the evolving threats, because they do not address the root cause of the rising security incidents, but rather focus on the symptoms or consequences of the incidents. References = Risk and Information Systems Control Study Manual, Chapter 3, Section 3.2.1, page 85.

Comparing risk rating against appetite is the most helpful criterion when prioritizing action plans for identified risk, as it helps to determine the urgency and importance of addressing the risk. Risk rating is the level of risk after considering the likelihood and impact of a risk event, and risk appetite is the amount and type of risk that an organization is willing to accept in pursuit of its objectives. By comparing risk rating against appetite, an organization can identify which risks are above, within, or below its tolerance level, and prioritize the action plans accordingly. Risks that are above the appetite level should be treated with the highest priority, as they pose a significant threat to the organization's objectives and performance. Risks that are within the appetite level should be monitored and controlled regularly, as they are acceptable but still require attention. Risks that are below the appetite level should be reviewed periodically, as they are negligible or insignificant.
References:
*ISACA, Risk IT Framework, 2nd Edition, 2019, p. 751
*ISACA, Tips for Prioritizing Risk in Your Risk Register2

The best way to mitigate the risk of customer identity theft is to implement layered security. Layered security is a defense-in-depth approach that applies multiple and diverse security controls at different levels and stages of the information system and the data lifecycle. Layered security can include physical, technical, and administrative controls, such as locks, firewalls, encryption, authentication, authorization, backup, audit, and policy. Layered security can help to protect the customer data and identity from unauthorized access, use, modification, disclosure, or destruction, by creating multiple barriers and deterrents for potential attackers, and by reducing the impact and likelihood of a successful breach. Layered security can also help to comply with the legal and regulatory requirements and standards for data privacy and protection, such as the Gramm- Leach-Bliley Act (GLBA), the Fair Credit Reporting Act (FCRA), and the Payment Card Industry Data Security Standard (PCI DSS)123. The other options are not the best way to mitigate the risk of customer identity theft, although they may be useful or complementary to layered security. Implementing monitoring techniques is a part of the layered security approach, but it is not sufficient, as it mainly focuses on detecting and responding to the incidents, rather than preventing or deterring them. Outsourcing to a local processor is a business decision that may or may not improve the security of the customer data and identity, depending on the quality and reliability of the service provider, and the terms and conditions of the outsourcing contract.
Conducting an awareness campaign is a good practice that can help to educate and inform the customers and the employees about the common types, methods, and indicators of identity theft, and the best practices and precautions to prevent or report it, but it does not directly apply or enforce any security controls to the information system or the data.