DrTrawma Wants to Study Whether Psychotherapy,cognitive-Behavioural Therapy,or Systematic Desensitization Is

Multiple Choice

Dr.Trawma wants to study whether psychotherapy,cognitive-behavioural therapy,or systematic desensitization is better at reducing his patients' anxiety due to post-traumatic stress disorder.The dependent variable in this study is

A) post-traumatic stress disorder.
B) the type of therapy.
C) the patients' levels of anxiety.
D) systematic desensitization.