Concept: Compare the worker counts for all trades to identify the largest number.Explanation: The given numbers are: 300,000 for shoe making, 25,000 for mining, 160,000 for road transport, 225,000 for agriculture, and 165,000 for manufacturing goods. The highest value among these is 300,000. This maximum corresponds to the trade "Shoe making". Thus, shoe making employed the most workers.Answer: C. Shoe making