Identify the Main Point or Issue in the Following Passage

question 29

Essay

Identify the main point or issue in the following passage, and decide whether the rest of the passage offers reasons for the main point (such as, whether the passage contains an argument), whether it illustrates (provides examples for) the main point, whether it explains the point, is irrelevant to the point, and so on.
"[F]ast food and national restaurant chains… that serve it have long been the object of criticism by nutritionists and dietitians. Despite the attention, however, fast-food companies, most of them publicly owned and sprinkled into the stock portfolios of many striving Americans…, have grown more aggressive in their targeting of poor inner-city communities. One of every four hamburgers sold by the good folks at McDonald's, for example, is now purchased by inner-city consumers who, disproportionately, are young black men."
-Greg Critser, "Let Them Eat Fat," in Harper's Magazine

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Definitions:

Inventory Turnover

A financial metric indicating how many times a company has sold and replaced inventory over a given period.

Fixed-Asset Turnover

A financial ratio that measures a company's ability to generate sales from its fixed assets.

ROA

Return on Assets; a financial ratio indicating how profitable a company is relative to its total assets.

ROE

Return on Equity, a measure of financial performance calculated by dividing net income by shareholders' equity, indicating how well a company uses investments to generate earnings growth.