The most important information to review from the acquired company to facilitate the task of updating the organization’s IT risk profile is the risk assessment and risk register. The risk assessment is a process of identifying, analyzing, and evaluating the IT risks of the acquiredcompany. The risk register is a document that records the details of the IT risks, such as their sources, causes, consequences, likelihood, impact, and responses. By reviewing the risk assessment and risk register, the risk practitioner can gain a comprehensive and accurate understanding of the IT risk profile of the acquired company, and integrate it with the IT risk profile of the acquiring organization. Internal and external audit reports, risk disclosures in financial statements, and business objectives and strategies are other possible sources of information, but they are not as important as the risk assessment and risk register. References = ISACA Certified in Risk and Information Systems Control (CRISC) Certification Exam Question and Answers, question 11; CRISC Review Manual, 6th Edition, page 144.