When setting up a Bring Your Own Device (BYOD) program, the primary security concern is ensuring that personal devices, which may not be under the company's direct control, do not introduce security risks into the organization. Among the options provided, the most relevant concern is: D. Jailbreaking Jailbreaking refers to removing the manufacturer's restrictions on a device, which can compromise the security of the device. This makes it more susceptible to malware and unauthorized access, posing a significant risk to the company's network and data when such a device is connected.

D Jailbreaking is the process of removing software restrictions that a device manufacturer has intentionally put in place. This allows users to gain more control over their device, such as: Installing custom firmware Installing third-party applications Choosing their operating system Getting apps from unofficial stores Turning their phone into a hotspot Changing the look and operation of their phone Changing phone settings at the administrator level