A Meta-Analysis Comparing the Effectiveness of Treatments for Generalized Anxiety

A meta-analysis comparing the effectiveness of treatments for generalized anxiety disorder (GAD) and panic disorder showed that:

A) relaxation training and cognitive therapy produced similar outcomes for GAD,but relaxation training showed better results for panic disorder.
B) cognitive therapy was superior to relaxation training for panic disorder,but relaxation training was more effective for GAD.
C) relaxation training and cognitive therapy showed similar results in treating GAD,but cognitive therapy was more effective in treating panic disorder.
D) cognitive therapy and relaxation training were equivalent in their effectiveness for both GAD and panic disorder.