Question

look at the graph below, which shows the population of the united states from 1790 to 1910.
us population growth (in
millions)
during the gilded age, the us population rose
from 15 million in 1830 to nearly 30 million in 1850.
from 15 million in 1830 to nearly 40 million in 1870.

Explanation:

The Gilded Age is roughly from the 1870s to the 1890s, but we analyze the population graph. First, check the time - population relationship. The first option: from 1830 to 1850, the time is before the Gilded Age (which is later, around post - Civil War to early 1900s). The second option: 1830 to 1870, and from the graph, the population in 1830 is around 15 million, and in 1870 it approaches 40 million, which aligns with the population growth trend shown (and the Gilded Age contextually has population growth, and the time frame here includes the lead - up and start of the Gilded Age - related growth). The first option's end year 1850 is too early for the Gilded Age - related growth focus here.

Answer:

The correct option is: from 15 million in 1830 to nearly 40 million in 1870.