Final answer:
Cold time/temperature control for safety (TCS) food can be served at an offsite location within 6 hours if it was kept at the proper temperature before service, specifically at or below 4 degrees C (40 degrees F).
Step-by-step explanation:
Under which condition can cold time/temperature control for safety (TCS) food be served at an offsite serving location within 6 hours? The condition required is that the food was kept at the proper temperature before service. This is crucial because bacteria generally multiply most rapidly at temperatures between about 4 and 60 degrees C (40 and 140 degrees F). It's important that the temperature in the refrigerator is kept at or below 4 degrees C (40 degrees F) to inhibit bacterial growth in refrigerated foods. If the cold TCS food has been maintained at this temperature before service, it can be served safely offsite within a 6-hour window.