A North Carolina broker listed a house for sale and advertised that it contained 3200 heated square feet based upon information provided by the seller. The listing agent did not personally measure the house or otherwise attempt to verify the square footage. A broker at a cooperating firm showed the property to a buyer client who entered into a contract to purchase the property. A real estate appraisal later revealed that the house contained only 2000 heated square feet. The Real Estate Commission may discipline?