Final answer:
The licensee's responsibilities when advertising properties on the Internet include responding within 48 hours and exercising proper supervision over any non-licensee who responds to inquiries.
Step-by-step explanation:
The licensee's responsibilities when advertising properties on the Internet (world wide web) can vary, but one important responsibility is to respond within 48 hours to inquiries. This timely response helps ensure good customer service and helps the licensee stay competitive. While the licensee may not necessarily have to respond personally to all inquiries, they must exercise proper supervision over any non-licensee who responds to inquiries to ensure accurate and professional communication with potential clients.