The correct answer is D. They were viewed by potential employers as troublemakers.
Step-by-step explanation:
The Pullman strike took place in 1894 as hundreds of workers of the Pullman company created a Union, and began a strike to show their opposition to certain working conditions such as previous wage reductions and excessive control. These strikes were responded with violence and some of the protesters were even killed.
Also, after the strike ended, many workers of the union were charged for organizing and promoting the strike. Besides this, some were blacklisted, and this caused the workers to have difficulties finding new jobs as employers believed they could promote strikes in their companies, and therefore were considered troublemakers.