What does the ADP system primarily manage?

The ADP system primarily manages payroll and work schedules, which is essential for ensuring that employees are compensated accurately and on time. This system streamlines various processes related to payroll administration, including calculating wages, withholding taxes, and managing deductions, thereby reducing errors and saving time for HR departments. Additionally, it helps organizations keep track of employee work schedules, making it easier to coordinate shifts, manage attendance, and ensure compliance with labor laws.

While other choices touch on important business functions, they do not align with the primary focus of ADP, which is centered around human resources and payroll management.