Describe the Lean Six Sigma approach. A. The melding of lean production and Six Sigma quantity practices. After the real estate bust of 2009, many companies began considering implementing some form of lean, Six Sigma, or combination approach. B. The melding of lean production and Six Sigma quality practices. After the dot-com bust of 2001, many companies began considering implementing some form of lean, Six Sigma, or combination approach. C. The melding of lean production and Six Sigma +1 quality practices. After the stock market crash of 1929, many companies began considering implementing some form of lean, Six Sigma +1, or combination approach. D. The melding of push systems and Six Sigma quality practices. After the dot-com bust of 2001, many companies began considering implementing some form of lean, Six Sigma, or combination approach