What does the phraseology for informing pilots to remain outside Class D airspace suggest about the workload or traffic conditions?

The phraseology for instructing pilots to remain outside Class D airspace indicates that there are likely increased workload and busy traffic conditions within the airspace. Class D airspace is often associated with airports that have a control tower, and during busy times, such airspace can experience a high volume of aircraft in both the vicinity and the pattern. By advising pilots to remain clear, air traffic control is communicating that the situation within that airspace is congested, thus helping to prevent potential conflicts or hazards. This instruction serves to maintain safety by reducing the number of aircraft operating in an already crowded environment, thereby emphasizing the importance of traffic management during peak operational periods.