Final answer:
Many Americans held a negative perception of labor union tactics (option d) during the time period discussed, as seen in the description of strikes in the 1877 passage from the American Railroad Journal.
Step-by-step explanation:
The conclusion that can be drawn based on the passage from the American Railroad Journal newspaper is that many Americans held a negative perception of labor union tactics. This is evident from the passage's description of strikes as 'repulsive, unsettling, demoralizing, disorganizing' and the assertion that they are 'contrary to public opinion' and 'damaging'. The passage suggests that despite recognizing the grievances of workers, there was a strong sentiment against the methods utilized by labor unions to achieve their goals during the time period, highlighting the tension between workers' rights and the broader societal impacts of union activities.