Which of the following are purposes of theoretical perspectives in abnormal psychology?
a. Understanding the DSM-5 diagnostic system.
b. Understanding the treatment of abnormality.
c. Understanding the causes of human behavior.

b. Understanding the treatment of abnormality.

c. Understanding the causes of human behavior.

Explanation:

Abnormal psychology is the study of abnormal thoughts, behaviors, or internal experiences in order to describe, predict, explain and treat these pattern of functioning.

So all of the theoretical perspective under abnormal psychology are set to help drive this definition above.

answer; the merit selection, also known as the missouri plan;

answer; decoy;