Concept:Reducing imported substitutes raises demand for local products, which creates more employment opportunities.
Explanation:When substitutes imported from abroad are reduced, consumers have fewer foreign alternatives and often turn to locally made goods.
This causes local firms to receive more orders, so they increase production.
Higher production requires more workers, leading to a fall in unemployment.
Options that centralize land, remove waste, or lower subsidies do not directly raise the need for labour in local firms.
Therefore, reducing imports of substitutes is the most effective way for local firms to reduce unemployment.
Answer:B. imports of substitutes are reduced.