Which Statement Best Represents the Evidence Supporting the Usefulness of Client-Centered

Which statement best represents the evidence supporting the usefulness of client-centered therapy for those with generalized anxiety disorder versus for those with the same condition who receive placebo therapy?

A) Client-centered therapy is only sometimes superior to placebo therapy.
B) Client-centered therapy is vastly superior to placebo therapy.
C) There is no difference,indicating client-centered therapy is not a useful approach.
D) Surprising research indicates placebo therapy is more effective than client-centered therapy.