Suppose That Total Sales in an Industry in a Particular

Multiple Choice

Suppose that total sales in an industry in a particular year are $600 million and sales by the top four sellers are $200 million, $150 million, $100 million, and $50 million, respectively. We can conclude that

A) price leadership exists in this industry.
B) the concentration ratio is more than 80 percent.
C) this industry is a differentiated oligopoly.
D) the firms in this industry face a kinked demand curve.