Which Is NOT a Sociological Reason for the Numerical Expansion

Which is NOT a sociological reason for the numerical expansion of conditions labeled "mental disorder"?

A) Mental health problems are more widespread because Americans are experiencing more stress and depression in society.
B) Scientific medical breakthroughs have identified a host of new organic causes of mental disorders.
C) Culturally,Americans are inclined to turn their problems into medical and psychological issues.
D) Powerful organizations demand an inflation in the number of mental disorders.
E) All of the above are sociological reasons.