Suppose an industry consists of 20 firms. Each firm's share of total sales in the industry is 5 percent. If two of the firms merge, then the four-firm concentration ratio in the industry will
A. increase.
B. remain unchanged.
C. depend on the market condition faced by the industry.
D. decrease as there are fewer firms in the industry.
Answer: A
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Fill in the blank(s) with the appropriate word(s).
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