Answer:
Option D, often earned wages insufficient to support their families adequately, is the right answer.
Step-by-step explanation:
In order to recover the economy, the United States encouraged the factory system and underwent the Industrial Revolution. Though all the output came from the machines, the owners required workers to operate the machines. Since lots of people were unemployed, they usually accepted to work at low wages. Sometimes the wage was so low that the workers failed to support their families.