Mobile device management (MDM) is the correct answer because it allows IT administrators to manage and secure employees' mobile devices remotely. MDM solutions typically provide the features necessary to enforce security policies, distribute software and apps, monitor compliance, and even remotely wipe sensitive data from lost or stolen devices. In contrast, corporate email configuration is more limited in scope, generally only configuring email settings, two-factor authentication adds an extra layer of security during login but does not encompass device management, and recognizing data caps is important for managing costs but doesn't address the security or management of the device directly.