Exam CMQ-OE topic 1 question 321 discussion

After learning that control charts were not being used in production, the manager of a newly created quality department provided SPC training to everyone in the plant. The manager received many favorable comments about the training in the weeks immediately after the training classes, and a number of departments began creating and using control charts. However, six months later, only the finishing area was using the charts.
If the manager were to survey the plant personnel at this point, which of the following measures of training effectiveness would be likely to receive a positive rating?