What did Sigmund Freud believe caused psychological disorders

A)  current stressful situations in one's life 
B)  maladaptive patterns of thinking established in childhood 
C)  inconsistency between one's self-concept and reality 
D)  unconscious conflicts left over from early childhood

Unconscious Conflicts

Internal struggles, often stemming from childhood, that reside outside of conscious awareness but influence behavior and emotions.

Sigmund Freud

As an Austrian neurologist, he was the progenitor of psychoanalysis, a therapy for mental illnesses facilitated through discussions between a patient and a psychoanalyst.

Psychological Disorders

Psychological Disorders are patterns of behavioral, cognitive, or emotional symptoms that impact multiple areas of life, leading to distress for the person affected.