Suppose there is an industry with annual sales of $60 million and three firms A, B, and C operating in that industry. The sales of the firms are $30 million, $15 million, and $15 million, respectively. The HHI for the industry is ______, which indicates an environment of ______.

A. 900; high competition

B. 900; low competition

C. 3,750; high competition

D. 3,750; low competition