A nurse is teaching a class about vulnerable populations. He instructs that vulnerable populations ...

A nurse is teaching a class about vulnerable populations. He instructs that vulnerable populations have been divided into three groups. Which of the following is not one of the three groups that research has identified?
 
  A. People suffering as a result of their behavior (for example, drug addicts)
  B. Children of parents who made bad decisions (for example, illegal immigrants)
  C. People who became vulnerable through no fault of their own (for example, from cancer)
  D. Adults that are born into vulnerable populations because of their ethnicity or race