The us population grew during the gilded age mainly because of

The United States has been the majority destination for European immigrants. Thus, between 1815 and 1860 five million people from Europe arrived in that country, and another 27 million entered between 1860 and 1920. Between 1840 and 1920 six million Germans immigrated, 4.75 million Irish, 4.5 million of Italians, 4.2 million English, Welsh and Scots, 4.2 million from the Austro-Hungarian Empire, 2.3 million from Scandinavia and 2.3 million from the Russian Empire (particularly Catholic, Polish and Jewish Lithuanians). 8 million Europeans arrived in 1890, about nine million between 1905 and 1914. In 1907, one million two hundred thousand immigrants entered, the largest annual income. Between 1874 and 1888, 5,881,000 immigrants arrived and between 1904 and 1935 16,878,000. Nearly 370,000 Swedes, Danes and Norwegians emigrated to the United States between 1850 and 1875.30

At the beginning of the 20th century, New York had the third German-speaking community worldwide after Berlin and Vienna.

the answer is c.richard m. nixon

i think it is the byzantine empire