In the late nineteenth century, organized labor failed to make great gains for all of the following ...

In the late nineteenth century, organized labor failed to make great gains for all of the following reasons EXCEPT
 
  A. the constantly shifting nature of the workforce.
 
  B. the opposition of powerful and wealthy corporations.
 
  C. tensions between ethnic and racial groups, which divided the work force.
 
  D. the relatively small membership of the major labor organizations when compared to the total workforce.
 
  E. the total failure of state and federal governments to pass legislation that would protect the rights of workers.