Final answer:
The length of the workday in the USA varies and is not uniform across the country, with averages suggesting that full-time workers often exceed the 8-hour workday norm.
Step-by-step explanation:
According to the instructor, the length of the workday in the USA varies widely and is not uniform across the country (Option C). While there is an idea of an 8-hour workday, the reality shows that average work hours can be significantly longer. For instance, data from the Bureau of Labor Statistics in 2013 states that U.S. workers averaged 38.5 hours per week, including part-time workers, with full-time workers averaging 42.5 hours per week. Additionally, industrial patterns and workers' preferences also play a role in the length of the workday, with some full-time workers having relatively fixed hours and part-time or younger workers being more flexible with their time. The historical work hours also differed, with factory employees in the late nineteenth century often working ten to twelve hours a day, six days a week.