Which statement is false?:

Group of answer choices

a. For a process to have Cp>1, the spread (i.e., variation) of approx. 99.7 percent of the actual process values must be greater than the difference between the specification limits.

b. High quality is closely tied with profitability.

c. Quality control and quality assurance are not synonyms.

d. Investments in quality control and assurance activities often result in decreasing failure costs.