Which of these occurred as a direct result of the us late 19th century industrialization

The correct answer for the question that is being presented above is this one: "D) movement of affluent whites from urban to rural areas." the migration to the cities since this is where many people were able to find employment in factories. 
Here are the following choices:
A) prison reform
B) women's suffrage
C) dangerous working conditions
D) movement of affluent whites from urban to rural areas