The risk owner is the person who has the authority and accountability to manage a specific risk and its associated controls. The risk owner is also responsible for ensuring that the risk is within the acceptable level and that the risk response is effective and efficient. In this case, the risk owner is also the owner of the business service that depends on the managed hosting service. Therefore, the risk owner should be notified of the new information about the flood risk first, as they have the most interest and influence on the risk and its impact on the business objectives. The risk owner can then decide on the appropriate actions to take, such as reviewing the contract terms, requesting additional controls, or changing the service provider. The other options are not the correct answers because they are not the primary stakeholders of the risk and its consequences. The data center manager is an employee of the managed hosting service provider, not the organization that procured the service. The data center manager may not have the authority or the incentive to address the flood risk or inform the organization. The site manager is also an employee of the managed hosting service provider, and their role is to conduct annual risk assessments under the contract. The site manager may not be aware of the new information or have the responsibility to communicate it to the organization. The CIO is the senior executive who oversees the IT strategy and operations of the organization. The CIO may have a general interest in the managed hosting service and its risks, but they are not the direct owner or managerof the specific risk or the business service that relies on the service. References = CRISC Review Manual, pages 32-331; CRISC Review Questions, Answers & Explanations Manual, page 702