Suppose an industry has total sales of $25 million per year. The two largest firms have sales of $6 million each, the third largest firm has sales of $2 million, and the fourth largest firm has sales of $1 million. The four-firm concentration ratio for this industry is
A. 60 percent.
B. 36 percent.
C. 25 percent.
D. 50 percent.
Answer: A
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