Suppose that a public policy professor at UCR finds that poverty rates increase the closer a household's home is to a polluting logistics warehouse in the Inland Empire. The professor argues that warehouses should be eliminated which will in turn reduce poverty. What might be wrong with this professor's analysis?

a. It is not possible for air pollution from a warehouse to impact people's incomes
b. The professor should have run a randomized control trial because that is the gold standard for social policy
c. The professor did not think that perhaps people who are at high risk of poverty may be inclined to live near warehouses because of low housing costs