The most relevant BYOD risk is data leakage because personally owned devices may access organizational networks, applications, email, files, and databases. These devices may be lost, stolen, infected with malware, poorly patched, connected to insecure networks, or used by unauthorized individuals. Option B may indicate training needs, but it is not the primary BYOD risk. Option C is unrelated because personally owned devices are not normally capitalized as organizational assets. Option D may occur, but the larger organizational exposure is loss or disclosure of business data, not the financial loss of the device itself. Internal audit should review BYOD policies, mobile device management, encryption, remote wipe, access restrictions, monitoring, and user agreements. Therefore, Option A is correct.