The completion of a project for implementing a new control would most likely require a risk practitioner to update the risk register. The risk register is a document that records the identified risks, their analysis, and their responses. The completion of a project for implementing a new control means that a risk response has been executed and a new control has been established. This may affect the likelihood and/or impact of the related risks, and the residual risk level. Therefore, the risk practitioner should update the risk register to reflect the current status and outcome of the risk response and the new control. The other options are not as likely to require a risk practitioner to update the risk register, as they are related to the reporting, planning, or assessment of the risks or the controls, not the implementation or completion of the risk response or the new control. References = Risk and Information Systems Control Study Manual, Chapter 2: IT Risk Assessment, Section 2.4: IT Risk Response, page 87.