Your supplier has submitted a Corrective Action Plan with a Contributing Cause listed as QUALITY ASSURANCE INSPECTOR FOR TECHNICAL DRAWING KEPT NO RECORD OF INSPECTION FOR NON-COMPLIANT DELIVERY. Which corrective action from the list is most likely in response to this contributing cause?

- QA Inspectors signed Administrative Sub-Performance Letters

- QA Inspectors wrote formal letters of apology to customers.

- QA Inspectors trained on record keeping requirements