Final answer:
Supporting a legacy application benefits from client-side virtualization, as it helps run incompatible software on newer operating systems through a virtual machine.
Step-by-step explanation:
The scenario that would benefit from client-side virtualization is supporting a legacy application.
Client-side virtualization allows a user to run an operating system or application within another operating system, which is particularly useful for running software that may not be compatible with a newer operating system.
By using a virtual machine, the legacy application can operate in an environment that it was originally designed for without interfering with the host operating system. This solves compatibility issues and extends the lifecycle of older software.