Which of the Following Was True of Early Unionism

Which of the following was true of early unionism?

A) All unions began as socialist organizations.
B) Marxist revolutionary socialists became leaders of the labor movement in most European countries.
C) American unions were never heavily influenced by Marxism.
D) By World War II, relations between unions and management had improved somewhat.
E) Employers generally accepted the inevitability of union development.