Many People Believe That the Herb Called St

Many people believe that the herb called St. John's wort can be used to treat depression. Researchers studying the effectiveness of this treatment have found:

A) that St. John's wort is not an effective treatment for depression.
B) that St. John's wort is a very effective treatment for depression.
C) that St. John's wort is effective, but not as effective as SSRIs.
D) mixed results, with some studies finding an effect while others do not.