Which of the following is a false statement about an integrated cost-leadership/differentiation strategy? a. Success of an integrated approach is measured by assessing both the gross margin (GPM) and the operating profit margin (OPM). b. Originally, an integrated approach was not considered by Michael Porter to be a legitimate business-level strategy. c. An integrated approach is more difficult to achieve than a cost-leadership strategy OR a differentiation strategy. d. K-Mart is an example of a company that failed to achieve an integrated approach. e. None of the above - they are all true statements about an integrated cost-leadership/differentiation strategy