Sociologists often categorize the American class structure into three broad tiers: the upper class, which holds significant wealth and power; the middle class, which encompasses a wide range of professionals and workers; and the lower class, which often faces economic instability and limited resources.

Traditional working-class identity was rooted in more than just economic position or labor market status. It was deeply embedded in social and cultural life. This identity was reinforced by dense local communities, strong extended kinship networks, and shared leisure activities, such as those centered around public houses and social clubs. These communal structures fostered a sense of solidarity and a distinct way of life that defined the working class throughout much of the twentieth century.

A class system is an open system of stratification where social standing is based on both birth and individual achievement. Unlike caste or slavery systems, which are closed, the class system allows for movement between different levels of the social hierarchy.

Traditional class analysis often relied on the 'conventional' view that women's class status was derived solely from their husbands. Option B highlights the economic reality of dual-earner households, which challenges the older, patriarchal assumption that women's labor is secondary or non-essential to family class standing.

Socioeconomic status (SES) is a composite measure of an individual's or family's economic and social position. Research consistently shows that SES is deeply intertwined with race and ethnicity due to historical patterns of systemic inequality, access to resources, and social stratification, which influence opportunities for education, employment, and wealth accumulation.

In sociological analysis, wealth—which includes assets, property, and income—is widely regarded as the primary determinant of social class. It provides the economic foundation that influences an individual's life chances, social status, and access to resources within a stratified society.

In the pre-revolutionary French social hierarchy, the Estates-General was divided into three groups. The First Estate consisted of the clergy, the Second Estate comprised the nobility, and the Third Estate included the commoners, which encompassed peasants, laborers, and the bourgeoisie.

In Marxist terminology, the bourgeoisie are the ruling class who own the means of production—such as factories, land, and capital—in a capitalist society. They derive their wealth from the surplus value generated by the labor of the proletariat, the working class who own only their labor power.

In sociology, prestige generally refers to the social evaluation of an occupation or position, whereas esteem refers to the personal reputation and respect an individual earns through their performance and conduct within that specific role.

Sociologists typically divide the middle class into subcategories based on income, education, and occupational prestige. The 'upper middle class' generally consists of highly educated professionals, while the 'lower middle class' includes white-collar workers, teachers, and small business owners.