Which of the following is least true?
   
A)
Pareto diagrams typically identify the 20% of all possible root causes that are responsible for 80% of the problems.
   
B)
In project QC, both product-related deliverables and project management deliverables are monitored.
   
C)
Statistical sampling means that inspection of only 50%, instead of 100% of the population, reduces testing time by half.
   
D)
Prevention over inspection is a project quality concept.