[Solved] According to Freud, dreams are A) a symbolic fulfillment of erotic wishes. B) the result of random neural activity in the brainstem. C) the brain's mechanism for self-stimulation. D) the disguised expressions of inner conflicts. Depression: A mood disorder characterized by persistent feelings of sadness, hopelessness, and a lack of interest or pleasure in activities. Comorbidity: The coexistence of two or more disorders or diseases in the same individual, often complicating the diagnosis, treatment, and prognosis. Meta-analysis: A statistical technique that combines the results of multiple scientific studies to identify patterns, contradictions, or other insights. Placebo Effect: The phenomenon in which a person experiences a physiological or psychological improvement after receiving a treatment with no therapeutic value, attributed to their belief in its efficacy.