On the diagram, S1 is the supply curve and D1 indicates the original demand for facemask X. A competing firm manufactures facemask Y, which is a close substitute. What would make the demand curve move to D2?
- Aa decrease in the costs of the materials to make facemask X
- Ba decrease in the costs of the materials to make facemask Y
- Can increase in the price of facemask X
- Dan increase in the price of facemask Y