high rates of employee absenteeism will have the most impact on:

High rates of employee absenteeism directly reduce the overall workforce availability, which negatively impacts the organization's ability to meet output goals.

Explanation of Other Options:

A. Quality: Can be indirectly affected if absenteeism forces untrained staff to perform critical tasks.

B. Morale: Absenteeism may cause frustration among remaining employees, but productivity is the primary concern.

C. Efficiency: Efficiency is reduced but is a secondary effect of decreased productivity.