Final answer:
A best-of-breed HRIS solution's advantage is the ease of data integration, as these systems provide robust, specialized functionalities that often include better integration capabilities.
Step-by-step explanation:
Among the given options, an advantage of a "best-of-breed" HRIS (Human Resources Information System) solution is C. Ease of data integration. These systems are typically specialized and offer more features relative to module-specific functionality, such as talent management or payroll, compared to integrated systems which may have broader, but less specialized features. Best-of-breed solutions are designed to be industry-leading for specific functions, meaning they often come with robust capabilities for that niche, which includes easier integration with other systems through well-defined APIs or data exchange standards.