Which of the Following Is Correct About Attempts to Introduce

Which of the following is correct about attempts to introduce industrial democracy in North America?

A) Industrial democracy was not considered in North America until the 1980s.
B) The only real attempt at introducing industrial democracy occurred during the Depression in the 1930s.
C) North American unions have been strong proponents of industrial democracy.
D) One of Canada's early prime ministers was a strong advocate of industrial democracy.