Although this depends slightly on what period you're referring to during this time, the best answer would be that "Immigrants" made up the largest percentage of workers in American industry during the late nineteenth century, since the economy had shifted towards industrial output as opposed to agrarian output.
<span>A. First Amendment
Freedom of Religion, Freedom of Speech, Freedom of the Press, the Right to Assembly, and the Right to Petition the Government for Redress of Grievances are the five freedoms basic to American life that can be found in the First Amendment.</span>
I would say A. This was a scandal involving the illegal manipulation of contracts by a construction and finance company associated with the building of the Union Pacific Railroad in the United States between 1865 and 1869.