正解:C
The best way to track organizational data in a BYOD environment is to enroll the personal devices in the organization's mobile device management (MDM) program. This will allow the organization to monitor, control, and secure the data on the devices remotely. Employees must also report lost or stolen devices and sign the acceptable use policy, but these are not sufficient to enable tracking of data. References: Info Technology & Systems Resources |COBIT, Risk, Governance ... - ISACA, section "Book IT Control Objectives for Sarbanes-Oxley, 4th Edition | Digital | English"