Question

multiple - choice question
what caused the population of the u.s. to double during the gilded age?
imigration to the u.s.
the 13th amendment
westward expansion
reconstruction

Explanation:

During the Gilded Age (1870 - 1900), a large - scale wave of immigration to the U.S. occurred. Many people from Europe and other parts of the world came to the U.S., which significantly contributed to the doubling of the U.S. population. The 13th Amendment abolished slavery, west - ward expansion was more about territorial growth, and Reconstruction was about the South after the Civil War, none of which directly caused the population to double like immigration did.

Answer:

immigration to the U.S.