A Meta-Analysis Conducted by Siev and Chambless 2007)examining Treatments for Panic

A meta-analysis conducted by Siev and Chambless 2007) examining treatments for panic disorder and generalized anxiety disorder,found that

A) relaxation and CBT are both equally effective for both disorders.
B) CBT is more effective only for panic disorder.
C) CBT is more effective only for generalized anxiety disorder.
D) CBT is more effective for both disorders.