According to the U.S. Department of Justice Merger Guidelines, a Herfindahl-Hirschman index (HHI) above is associated with a highly concentrated industry. Therefore, if the automobile industry had an HHI of 2,200, then a vertical merger between GM and one of its suppliers likely would be: Select one: O A. 1,800 and rejected since the HHI is above the acceptable threshold O B. 1,300 and rejected since the HHI is above the acceptable threshold O C. 2,400 and approved since the HHI is below the acceptable threshold O D. None of the answers are correct