the elasticity of supply for a product tends to be higher

a. the lower is the elasticity of demand for the product.
b. the higher is the elasticity of demand for the product.
c. the easier it is for the firm to shift from the production of one product to another.
d. the harder it is for the firm to shift from the production of one product to another.



答案是C，请教各位给出详细解释，谢谢哈~~