D₁ and S₁ are the initial demand and supply curves for a normal product. They then change to D₂ and S₂. [Figure 6.1] Which pair of changes would result in the market equilibrium for the product changing from X₁ to X₂?
✓ Correct Answer
The correct answer is A: fall in the price of a raw material used in the manufacturing and a decrease in the price of a complementary good
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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