Cost-benefit analysis should be conducted whenever there is a major change or at least once a year to ensure that organizational decisions remain effective and aligned with current conditions. In Human Resource and organizational management, regular evaluation helps assess whether investments in security, personnel, training, and systems continue to provide value relative to their cost. Annual reviews allow management to adjust strategies based on changing risks, workforce needs, and operational priorities. Waiting longer periods, such as two or three years, may result in outdated decisions and inefficient resource allocation. Conducting the analysis too frequently may not provide meaningful changes unless significant updates occur. Therefore, performing a cost-benefit analysis annually, in addition to major changes, ensures continuous improvement, accountability, and effective use of organizational resources, making option A the correct answer.