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Passage: Rising food prices have pushed many low-income families toward less nutritious, calorie-dense diets, raising concerns about long-term public health. Agricultural economists point to supply chain inefficiencies, not just production shortages, as a major driver of price volatility. Improving storage and transport infrastructure, they argue, could stabilize prices more effectively than short-term subsidies alone. Question: What is the main idea of the passage?
A. Supply chain problems, not only production, drive food price instability ✅
B. Food prices have remained completely stable
C. Subsidies are the only effective long-term solution
D. Nutritious food has become cheaper for everyone
