In a Study of the Treatment of Social Anxiety Disorder

In a study of the treatment of social anxiety disorder, Herbert et al. (2005) compared the effectiveness of CBT alone to the effectiveness of CBT combined with social skills training. What did Herbert et al. find What might their study be called

A) CBT combined with social skills training was more effective than CBT alone.Herbert et al.'s work is called a meta-analysis.
B) CBT combined with social skills training was more effective than CBT alone.Herbert et al.'s work is called outcome research.
C) CBT combined with social skills training was more effective than CBT alone.Herbert et al.'s work is called a clinical assessment.
D) CBT combined with social skills training was no more effective than CBT alone.Herbert et al.'s work is called outcome research.