The primary goal of a root cause analysis is to determine the underlying reasons why an incident happened. By identifying these root causes, an organization can address and mitigate the risks to prevent similar incidents from occurring in the future. Answer 'Improving overall security posture for future threats' is incorrect because it is a broader goal that encompasses more than just understanding and addressing root causes. 'Assessing the damage caused by the incident' is not the primary goal but rather a necessary step during incident response. Lastly, 'Implementing quick fixes to systems' is not a goal of root cause analysis; quick fixes might be applied during containment but do not relate to understanding the fundamental reasons for an incident.