Where do you think most people were moving to during the late 1800s and early 1900s?

Explanation:

More than 70 percent of all immigrants, however, entered through New York City, which came to be known as the "Golden Door." Throughout the late 1800s, most immigrants arriving in New York entered at the Castle Garden depot near the tip of Manhattan. Americans increasingly moved into cities over the course of the late nineteenth and early twentieth centuries, a movement motivated in large measure by industrialization.

i think it was   tsar alexander ii