中等ECON-DEMA-005
A technological improvement lowers production costs. In a competitive market, this will lead to:
A. A decrease in supply, raising price and lowering quantity
B. An increase in supply, lowering price and increasing quantity✓ 答案
C. An increase in demand, raising price and quantity
D. A decrease in demand, lowering price and quantity
解說
Lower production costs shift the supply curve rightward. At the original price, there is a surplus, pushing price down and quantity up. This is a supply-side change, not a demand shift.