Final answer:
Late nineteenth-century factories were characterized by very low wages, dangerous working conditions including exposure to high heat and chemicals, along with extremely long workdays of 10 or more hours for at least six days a week.
Step-by-step explanation:
The statements that best describe working conditions in late nineteenth-century factories are: a) Workers earned very low wages. Some were even paid in scrip, b) High heat, harmful chemicals, dangerous machinery, and poor ventilation were common risks of employment, and d) Workdays were usually 10 or more hours, at least six days per week. Conditions were often extremely difficult, with long hours, low pay, hazardous environments, and strict and sometimes abusive oversight. Safety was not a priority, emissions from machinery and fibers from production could cause health issues, and injuries were common. There was minimal regard for worker safety, and little to no public assistance or social welfare to support those injured or unemployed.