The Industry Elasticity of Demand for Gadgets Is −2,while the Elasticity

The industry elasticity of demand for gadgets is −2,while the elasticity of demand for an individual gadget manufacturer's product is −2.Based on the Rothschild approach to measuring market power,we conclude that:

A) there is little monopoly power in this industry.
B) there is significant monopoly power in this industry.
C) the Herfindahl index for this industry is −2.
D) the Herfindahl index for this industry is 2.