Updating the risk register to include outcomes from a risk assessment is the greatest benefit because it enables the organization to prioritize and respond to the most significant risks in a timely manner. The risk register is a tool that records and tracks the current status of risks, their likelihood, impact, and response strategies. By updating the risk register with the results of a risk assessment, the organization can ensure that the risk information is accurate, relevant, and actionable. Maintaining evidence of compliance with risk policy, validating the organization’srisk appetite, and helping to mitigate internal and external risk factors are all possible benefits of updating the risk register, but they are not the greatest benefit, as they do not directly support risk-based decision making. References = Risk and Information Systems Control Study Manual, Chapter 3, Section 3.2.1, page 83