The primary purpose of performing a parallel run of a new system is to verify the new system provides required business functionality. A parallel run is a type of testing that involves running the new system alongside the existing system, allowing the user to compare the outputs of the two systems and verify that they are providing the same results. This helps ensure that the new system is meeting the required business needs and that it is properly configured. According to the ISACA CISA Study Manual, "parallel runs are used to confirm that the new system provides the required business functionality".

Based on the information provided, the first step in the risk assessment process should be to identify C: Information assets. Information assets are the most important component of the risk assessment process, as they are the basis for assessing the potential risks to the organization. Identifying information assets allows the auditor to assess the value and criticality of the assets and determine the level of risk associated with them. Once the information assets have been identified, the auditor can then move on to assess the vulnerability of the assets to threats, evaluate existing controls, and consider any relevant legal requirements.