Suppose that large-scale pork production has the potential to create ground water pollution. Why might this type of pollution be considered an externality?
A、The groundwater pollution reduces the cost of large-scale pork production.
B、The economic impact of a large-scale pork production facility is localized in a small geographic area.
C、The pollution has the potential for creating a health risk for water users in the region surrounding the pork production facility.
D、Consumers will not reap the benefits of lower production cost from large-scale pork production.