If preventive controls cannot be implemented due to technology limitations, the first step to reduce risk is to evaluate alternative controls. Alternative controls are those that can achieve the same or similar objectives as the original preventive controls, but using different methods or technologies. For example, if a firewall cannot be installed due to hardware compatibility issues, an alternative control could be a network segmentation or a proxy server. Evaluating alternative controls requires assessing their feasibility, effectiveness, efficiency, and cost-benefit. Redefining the business process, developing a plan to upgrade technology, and defining a process for monitoring risk are also possible actions to reduce risk, but they are not the first step, and they may not be feasible or desirable in some situations. References = Risk and Information Systems Control Study Manual, Chapter 4, Section 4.3.1, page 4-23.

Compensating controls are additional or alternative controls that are implemented when the existing controls are found to be ineffective or do not meet the required standards. Compensating controls are designed to reduce the risk exposure to an acceptable level and ensure that the organization can still comply with the relevant regulations and industry best practices. For an organization that processes credit cards, compensating controls may include enhanced encryption, monitoring, auditing, or authentication mechanisms. By having compensating controls in place, the organization can maintain an effective overall control environment despitethe deficiencies in the existing controls. The other options are not correct because they do not ensure that the overall control environment is effective. A control mitigation plan is a document that outlines the actions and resources needed to address the control deficiencies, but it does not guarantee that the compensating controls will be implemented or effective. Risk management is a process that involves identifying, analyzing, evaluating, and treating risks, but it does not directly affect the control environment. Residual risk is the risk that remains after the risk treatment, and it may or may not be acceptable depending on the risk appetite of the organization. References = CRISC Review Manual, pages
153-1541; CRISC Review Questions, Answers & Explanations Manual, page 632

Acost-benefit analysisevaluates the financial implications of acquiring cyber insurance versus the potential loss exposure. This approach enables informed decision-making by comparing the insurance cost with the potential savings from covered risks.

Cost-benefit analysis evaluates whether the benefits (e.g., risk reduction, efficiency) of implementing the new tool justify the costs (e.g., acquisition, maintenance). This analysis is critical for informed decision-making and resource optimization.
Reference:CRISC Manual - Domain 3, Slide 325, 303

Multi-factor authentication (MFA)significantly reduces the risk of account compromise by requiring multiple forms of verification, such as a password and a one-time code, enhancing security beyond single-factor authentication methods.