Answer:
D. the limited number of places aid is needed worldwide.
Step-by-step explanation:
Aid organizations experience various types of problems that are exclusive to the industry. For example, it can be difficult to obtain some of the resources needed, such as food and medicine. Another problem they face is the difficulty of ensuring the safety of their workers in certain areas of the world. Finally, they also struggle with the rising costs of aid work. However, a problem that they do not have is the limited number of places aid is needed worldwide, as this is always much larger than the places aid organizations can help.