According to ( ), the purpose of strategy was to gain and defend some form of competitive advantage, and there are three generic forms of corporate strategy. E.William A.Charles W.L. Hill B.Michael Porter C.Clara Shih D.Cohen

According to ( ), the purpose of strategy was to gain and defend some form of competitive advantage, and there are three generic forms of corporate strategy. E.William A.Charles W.L. Hill B.Michael Porter C.Clara Shih D.Cohen

正确答案：B