Population growth during the Gilded Age was due in large part to

A - unemployment among workers. B - an improved food supply. C - better health care. D - immigration to the United States.

The answer is D. Mark Twain called the late nineteenth century the "Gilded Age." By this, he implied that the period was sparkling at first glance yet degenerate underneath. The late nineteenth century saw the making of a cutting edge modern economy.

The correct answer is D) Immigration was huge during the gilded age. What is the Gilded age? It's from the history of the United States, and it's a period from the late 19th century, from the 1870s to about 1900. The term that the period got came into use in the 1920s and 1930s.