Use reasoning to lead to the answer of the following question:
Joe wanted to own a neighborhood barbershop but he had trouble with city zoning laws. What might the city have required of his shop that was a problem?\nOptions:\n- flush\n- razor\n- commercial area\n- city\n- water
 Reasoning process:
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Barbershop is a business place. Business place comes under commercial area as per zoning laws. Therefore, the final answer is commercial area.
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