Ass per psychoanalytical theory and Sigmund Freud theory of personalities, abnormal behavior is defined as the normal feelings, person’s age, grief, happiness and kind of illness in the routine life. Historical evidences are very modest and lower to thoroughly examine the ways how ancient people have treated this abnormal behavior.
The ancient theories such as Egyptian and Greek version of abnormal behavior have explained the kind of treatment used to treat these abnormal hallucinations, hysteria, and delusions.
Therefore, organic models and modern technology has not explained significantly patient’s symptoms and meticulously about spirits, demons.
Thus, the options (b), (c) and (d) are incorrect.
Historical evidences are very modest and lower to thoroughly examine the ways how ancient people have treated this abnormal behavior.
Therefore, the correct option is – a. historical evidence is scanty.