Which of the following presents the GREATEST challenge to managing an organization's end- user devices?

An incomplete inventory means the organization doesn't know what devices are on its network or being used by its employees, creating significant blind spots for security, patching, compliance, and asset management. Devices not in the inventory cannot be properly managed, secured with policies, or updated, leaving them vulnerable and posing a substantial risk to the entire enterprise network.

Unsupported end-user applications are a significant risk, but they are often discoverable and can be addressed if the devices themselves are known and managed.

Incompatible end-user devices might cause operational friction, but if these devices are inventoried, their incompatibility can be understood and managed through policies or replacement programs.

Managing multiple end-user device models adds complexity, but this complexity is manageable if all devices are known and tracked within a comprehensive inventory system.