Which One of the Following Statements About Six Sigma Quality

Which one of the following statements about Six Sigma quality programs is true?

A) While Six Sigma programs often improve the efficiency of numerous operating processes, there is evidence that the approach can stifle innovative activities.
B) Six Sigma is a philosophy of managing a set of business practices that emphasizes continuous improvement in all phases of operations and 100 percent accuracy in performing tasks.
C) Six Sigma's DMAIC process is a particularly good vehicle for improving performance when there are small variations in how well an activity is performed.
D) The focus of Six Sigma programs is on the development of new products or new business processes but not on improving existing products or business processes.
E) Six Sigma is a system of statistical procedures for eliminating 92% of the variability in how a task is performed.