Sora composes a point-by-point outline for his writing assignment about the American diet. He is most likely writing about

A point-by-point outline is useful for organizing ideas that compare or discuss related points in a topic. Since Sora’s assignment is about the American diet, the choice about problems with typical American food and possible solutions best fits that structure and subject. The math-class choice is unrelated, while the other choices focus on narrower topics rather than the diet as a whole.

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