Final answer:
Option (b), The Haymarket Riot, the Homestead Incident, and the Pullman Strike resulted in violence and a severe backlash against organized labor, hindering rather than helping the labor movement.
Step-by-step explanation:
Events such as the Haymarket Riot, the Homestead Incident, and the Pullman Strike did not help organized labor but rather, these events had a detrimental effect on the labor movement. While these incidents arose out of labor disputes and brought national attention to the struggles of the working class, they often resulted in a backlash against labor organizations.
The Haymarket affair of 1886 began as a peaceful rally for the eight-hour workday but ended violently when a bomb was thrown at police, which led to public outrage and a crackdown on labor activists. The Homestead Steel Strike and Pullman Strike were also marked by violence and ended with severe setbacks for labor, including the weakening of unions and overall public support for labor causes. The aftermath of these incidents involved harsh public and governmental reactions that crippled labor organizations for decades.
Overall, these events reflected the deep tensions between labor and management, revealing a growing sense of conflict and mistrust. The violence and the resulting stigma against organized labor were significant obstacles that unions had to overcome in the following years.