A)     1,    2    and    3

1.     World War I (The Great War)
        The active military role played by Canada during the First World War contributed to greater
        autonomy from Britain.           Correct !

2.     The Years of Despair (The Dirty Thirties)
        These years were characterized by the Great Depression, which brought about the bankruptcy of
         numerous businesses and widespread unemployment.  Not Correct !

3.     The Years of Prosperity (The Roaring Twenties)
        These years were characterized by the growing popularity of the automobile, the airplane, the
        radio, talking pictures and the Charleston, a dance that originated in the United States.
        Not Correct !