What information can be derived from a user's transaction log in Event Viewer?

The reason that records of all user actions performed on the system is the correct answer relates to the comprehensive nature of a user's transaction log in Event Viewer. Transaction logs typically capture a variety of activities undertaken by a user, including but not limited to, file access, application usage, and changes made to system settings. This allows an investigator to gain insights into user behavior and patterns, enhancing the understanding of actions taken on the system, which is crucial for investigations.

While successful login attempts are indeed logged, they represent a narrower scope of data and do not encompass the full range of user activities. Application settings modified by a user may be documented, but this information is usually part of broader logs and not the primary focus of event logs. Information about application crashes is valuable for troubleshooting but does not reflect user actions directly. Thus, the breadth of what is recorded in a user’s transaction log makes it a critical tool for understanding all user interactions with the system.