Which of the following was a result of violent activities associated with union activism near the end of the 19th century?

select one:
a. business leaders began employing only native-born workers under "yellow dog" contracts.
b. unions became linked to radical ideas, and public support decreased sharply.
c. union leaders attempted to improve their image by accepting women and other minorities.
d. the federal government passed strict laws related to union formation and activities.

d. The federal government passed strict laws related to union formation and activities.

Explanation:

At the end of the nineteenth century workers began to organize themselves as a means of confronting employers and questioning the situation of the time. The first signs of union between workers appear with the breakdown of factory machines as a form of resistance, a movement known as playfulness. The motivation was the workers' view that they were being replaced by machinery in industries.

In response to the violent activities associated with trade union activism, the federal government passed strict laws related to union training and activities. Among these laws, the government was the law that extended free association to the workers, something that was previously allowed only to the dominant social classes. As a result, trade unions, trade union organizations equivalent to current unions, are being created.

i think the answer is the one about environmental and social health.

hope this