Which Would Result in a Decrease in the Elasticity of Demand

Multiple Choice

Which would result in a decrease in the elasticity of demand for a particular resource?

A) A decrease in the rate at which the marginal product of that resource declines.
B) An increase in the elasticity of demand for the product that the resource helps to produce.
C) A decrease in the percentage of the firm's total costs accounted for by the resource.
D) An increase in the substitutability of other resources for the particular resource.