Which event best supports the authors claim that the irish were a powerful group in new york

the rise of the Tammany Hall political machine

Explanation:

The rise of the Tammany Hall political machine was the best demonstration of the power of Irish immigrants in New York. This organization helped to empower thousands of New Yorkers, mainly Irish Catholic immigrants, in the late 1800s.

troy donahue,   i think.

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.