Read this claim from an argumentative essay about zoos.

zoos must improve conditions so that they can meet the health and safety needs of the animals.

which piece of evidence, if true, would best support this claim?
exposure to different animals can to educate the public.
funding sources for zoos can be limited, so they often rely on donations from the public.
many animals die prematurely in zoos because they are exposed to infectious diseases.
animals can be bred at zoos to increase their population.