Hawk Corporation purchased 10,000 shares of Diamond Corporation stock in 2008 for $50 per share and classified the investment as securities available for sale. Diamond's market value was $60 per share on December 31, 2009 and $65 on December 31, 2010. During 2011, Hawk sold all of its Diamond stock at $70 per share. In its 2011 income statement, Hawk would report a gain of A. $300,000. B. $150,000. C. $200,000. D. $50,000.