Unavailability of critical IT systems poses the greatest risk to an organization’s operations during a major IT transformation, because it can disrupt the business continuity, productivity, and performance of the organization. Unavailability of critical IT systems can also cause financial, reputational, or legal damages to the organization, and affect the quality and delivery of products or services to the customers. The other options are not the greatest risks, although they may also pose some challenges or threats to the organization during a major IT transformation. Lack of robust awareness programs, infrequent risk assessments of key controls, and rapid changes in IT procedures are examples of management or process risks that can affect the planning, execution,or monitoring of the IT transformation, but they do not have the same impact or severity as the unavailability of critical IT systems. References = CRISC: Certified in Risk & Information Systems Control Sample Questions