Match the Definition with the Term

Match the definition with the term.
-randomized controlled trial

A) a field that studies the social and environmental factors that contribute to mental health and illness in communities
B) a statistically derived measure of personality factors relevant to understanding psychopathology
C) a technique in which patients are shown a series of unstructured,ambiguous stimuli and responses are assessed in terms of perceptual processes
D) the random assignment of participants in a study to different treatment groups