Researchers Have Found That People Who Live in Crowded Cities

Multiple Choice

Researchers have found that people who live in crowded cities are more likely than others to develop schizophrenia (a psychological disorder) . From these results, which of the following conclusions (if any) can we draw?

A) Something about life in crowded cities leads to schizophrenia.
B) People with schizophrenia are more likely than others to move to crowded cities.
C) The kinds of people who are predisposed to schizophrenia are also likely to choose to live in a crowded city.
D) The results do not justify any of these conclusions.