The NPK Precision Products salesperson called on the dentist and described his company's new drill as having "unbelievable cutting power" and "a perfect balance to reduce hand fatigue." The dentist looked at the salesperson as if he were crazy and said, "I will never use your company's product. It was due to an NPK product that I failed to graduate with the rest of my classmates." In terms of the communication process, the dentist: Encoded the message O Created noise O Provided feedback O Changed the communication channel O Altered the communication medium