The inputs used to produce cupcakes (e.g., flour, sugar, butter, and labor) are also used to produce cookies, cakes, muffins, pies and many other goods. This suggests that:
A.the elasticity of supply of cupcakes is relatively high.
B.cupcakes are a normal good.
C.the elasticity of supply of cupcakes is relatively low.
D.the supply curve for cupcakes is downward sloping.
正确答案：the elasticity of supply of cupcakes is relatively high.
