Corrective action and root cause

Answer:
I would consider a correction and a corrective action.
What is the NC? Lack of understanding of the standard. How can we eliminate the NC? Correction: Identify all functions and roles with lack of understanding of the standard and provide a training action, or a workshop, or any other way of removing that lack of understanding.
What is the cause of the NC?
For example (clause 1): That requirement was not included in the job description. Corrective action: Update the job descriptions where that requirement is missing.
For example (clause 2): People had training, but it was not effective.
Corrective action: Update training requirements to be able to remove bad trainers from future training opportunities.

The following material will provide you information about root cause analysis:
- ISO 9001 – How to use root cause analysis to support corrective actions in your QMS - https://advisera .com/9001academy/blog/2016/03/01/how-to-use-root-cause-analysis-to-support-corrective-actions-in-your-qms/
- Free webinar – Measurement, analysis, and improvement according to ISO 9001:2015 - https://advisera.com/9001academy/webinar/measurement-analysis-and-improvement-according-to-iso-9001-2015-free-webinar/
- book - Discover ISO 9001:2015 Through Practical Examples - https://advisera.com/books/discover-iso-9001-2015-through-practical-examples/