The Growth of Labor Unions and the Implementation of Better

The growth of labor unions and the implementation of better working conditions in England owed a debt of gratitude to

A) the threat of Marxism that made Parliament amend laws and individual businessmen show more concern for their workers.
B) the example set by unions and management in the United States.
C) the urbanization and education of more people in various countries, of which England wanted to prove itself most liberal.
D) those individuals who, risking their jobs and in some cases their lives, were willing to work toward gaining legal acceptance of labor unions throughout Europe.
E) the Chartist movement in England.