Which One of the Following Statements Is TRUE

Multiple Choice

Which one of the following statements is TRUE?

A) With due diligence, variation in a process can be completely eliminated.
B) No two products are exactly alike because the processes that produce them contain many sources of variation, even if the process is a machine.
C) Common causes of variation are those factors that can be identified as commonly occurring at a particular process.
D) SPC and TQM are two competing techniques for quality control.