In Researching the Problem of Homelessness in the City, the Nurse

In researching the problem of homelessness in the city, the nurse discovers that the number of mentally ill homeless has steadily grown over the past couple of decades. Which reason can the nurse point out is most likely responsible for this situation?

A) Deinstitutionalization
B) An increase in the prevalence of major mental illness
C) Economic downturns
D) Shortages of affordable housing