Comprehensive and Detailed In-Depth Explanation: Mobile Device Management (MDM) is a security solution that allows organizations to enforce policies on employee-owned or company-issued mobile devices. It can restrict the installation of unauthorized applications, ensuring that only company-approved apps are used. * Containerization isolates work applications from personal applications but does not enforce app restrictions. * Data Loss Prevention (DLP) focuses on preventing sensitive data leaks rather than managing app installations. * File Integrity Monitoring (FIM) tracks changes to files and system configurations but does not control app installations. Therefore, MDM is the best solution for restricting unauthorized applications on personal devices.