Final answer:
The A-level activity for Donald, the supervisor in a manufacturing company, should involve the processing of raw materials known as manufacturing.
Step-by-step explanation:
Based on the information provided, the activity that should be categorized as an A-level activity for Donald, the supervisor in a manufacturing company, is anything that involves the processing of raw materials, known as manufacturing. Manufacturing is a secondary activity and it was the main area of economic growth in the United States for decades.