The correct answer is D. Trash is spilling over in one or more of the trash receptacles.
Step-by-step explanation:
Waste disposal refers to the processes, methods, and activities necessary to deal with waste or materials that are no longer usable. In the case of restaurants, stores, and similar these participate only in the process of collecting wastes and placing them in appropriate trash receptacles or dumpsters as these are later emptied by specialized companies that continue the process by transporting and handling the waste.
According to this, the one that is an indicator of a disposal problem is "Trash is spilling over in one or more of the trash receptacles" because this shows the restaurant is not handling correctly wastes as they do not have enough trash receptacles. Also, there is not an appropriate number of trash receptacles but this number should be adjusted to the needs of the restaurant and the number of wastes this produces.