Which of the following statements about quality costs is true?

Select one:

a. A high level of appraisal costs usually indicates that more attention needs to be paid to external failure costs.

b. A low level of external failure costs usually indicates that more attention needs to be paid to appraisal and internal failure costs.

c. A high level of internal failure costs usually indicates that more attention needs to be paid to prevention and appraisal costs.

d. A low level of internal failure costs usually indicates that more attention needs to be paid to prevention and appraisal costs.