Query related to answer

During a project update meeting, one of the key stakeholders expressed his displeasure over the recently produced deliverables. 1% of the produced deliverables had minor defects. This stakeholder has been a resisting stakeholder so far. What must the project manager do in order to bring the future project performance in line with the approved quality requirements?
 
A. Investigate the root cause and identify the required defect repair.
B. Investigate the root cause and identify the required preventive action.
C. Investigate the root cause and identify the required corrective action.
D. Ignore the complaint from the resisting stakeholder.
 
 
 
I think B is the correct answer, since question is talking about the future project performance and preventive action does exactly that. Howeve the Christopher Scordo explains C as the right answer.
Can anyone here please explain why C is correct?
admin's picture

Since the issue has already happened and 1% is defective you will need to take corrective action and not preventive action for future.