Which One of the Following Is the Cause of the Greatest

Which one of the following is the cause of the greatest overall costs to the community for providing health care to the homeless?

A) The need for increased preventive services to address the health conditions of the homeless population
B) The need for more frequent clinic visits by homeless clients for multiple health problems
C) The spread of contagious diseases by homeless people to those they pass on the street
D) The fact that most of the care for homeless people takes place in hospital emergency departments