Which one of the following, related to support, may be a valid nonconformity recorded against the requirements of ISO 9001:2015 during a quality management systems audit?
A) A training matrix was not developed tor the quality control personnel for the current year
B) Personnel on the shop floor were not aware of how they could influence the quality management system 7
C) Quality procedures used in the production line were not reviewed every second year
D) It could not be demonstrated that personnel conducting tests calibrated to ensure accurate monitoring.