Final answer:
The "working class" is another term for the lower class, involving jobs with less formal education and lower incomes, often consisting of routine manual or service tasks. Option d.
Step-by-step explanation:
The term "working class" is another way to refer to the lower class.
This class distinction is rooted in the socioeconomic hierarchy where the working class is the highest subcategory within the lower class. Those in the working class typically have jobs that are more routine, involve manual labor, or are in the service industries, such as landscaping, cooking, cleaning, or building.
Unlike the lower-middle class, which may include technical, lower-level management, or administrative support positions, working-class jobs generally offer less formal education and are associated with lower incomes.
People in these positions may have fewer opportunities for significant savings or income growth, making their socioeconomic status more precarious when compared to upper-tier classes.
Moreover, it is the highest earners who make up the upper class, and those at the bottom are considered lower income.
The majority of U.S. residents, approximately 60 percent, are identified as middle class. One pertinent framework categorizes the middle class as having a household income that falls between two-thirds and twice the national median. So option d.