As part of a class activity, nursing students are engaged in a small group discussion about the ...

As part of a class activity, nursing students are engaged in a small group discussion about the epidemiology of mental illness. Which statement best explains the importance of epidemiology in understanding the impact of mental disorders?
 
  A) Epidemiology helps promote understanding of the patterns of occurrence associated with mental disorders.
  B) Epidemiology helps explain research findings about the neurophysiology that causes mental disorders.
  C) Epidemiology provides a thorough theoretical explanation of why specific mental disorders occur.
  D) Epidemiology predicts when a specific psychiatric client will recover from a specific mental disorder.