Though most humane societies are ran solely off donations, sponsors, etc, there are few animal shelters and other similar institutions that aren't. But for this question, we can eliminate all of the answers that are incorrect.
Firstly, let's look at A. preventive medicine specialists. Preventive medicine specialists research and try to create ways to fight disease and look for ways to improve overall health.
Second, let's look at B. multi-veterinarian practices. We know that humane societies aren't veterinarians, so we can automatically eliminate that answer.
Lastly, let's look at D. academic institutions. An academic institution is a place such as a school, university, or college. We know that humane societies are teaching groups of people on a regular basis, so that's definitely not our answer.
The only answer left is C. nonprofit institutions, which is the accurate answer.
Hope this answer helped you out. :)
