Final answer:
The subject of this question is Social Studies. It explores the income and occupations of a specific percentage of the population, including factory workers and clerical workers.
Step-by-step explanation:
The subject of this question is Social Studies. The question is addressing the income and occupations of a specific percentage of the population, such as factory workers, clerical workers, low-paid retail salespeople, and craftspeople. It also mentions the corresponding average income of about $36,000/year for these individuals, who typically have a high school education and possibly some college.