Final answer:
Under the just-in-time system, Harold Corporation is likely to see Option 1: an increase in units scoring 9 on the quality scale.
Step-by-step explanation:
The likely scenario under the just-in-time system for Harold Corporation would be an increase in units scoring 9 on the quality scale (Option 1). Just-in-time manufacturing focuses on improving quality control by identifying and addressing issues immediately. By purchasing units that score higher on the quality scale, Harold Corporation can ensure that defective parts are not shipped to the main assembly plant, resulting in better overall quality.