Which of the following describes best Juran s model of optimum quality costs?

• A. It includes costs of internal and external failures curve, costs of appraisal and prevention curve and total quality costs curve
• B. It includes costs of internal and external failures curve and costs of appraisal and prevention curve
• C. It includes costs of internal and external failures curve and total quality costs curve
• D. It includes costs of appraisal and prevention curve and total quality costs curve