A Factory Was Experiencing a Disproportionately Large Number of Defects

Multiple Choice

A factory was experiencing a disproportionately large number of defects coming from a particular machine and chose to research the problem by dismantling the equipment to evaluate measures of wear on its various parts.This is an example of ______.

A) direct observation
B) linguistic behavior
C) physical traces
D) verbal observation
E) None of the above