Final answer:
An audit trail in computer systems is a recording of system activities that is used for review. It documents the sequence of events and changes, providing critical information for security and compliance. The correct answer is C) Records system activities for review.
Step-by-step explanation:
In the context of a computer system, an audit trail refers to a record that documents the sequence of activities or events affecting the operation of a system. Specifically, the correct answer to your question is C) Records system activities for review. An audit trail helps in tracking changes in the system, provides evidence of the system's operation, and is a critical component in security and compliance efforts. For example, if changes are made to critical system files or data, the audit trail will record who made the change, what was changed, and when it was changed. This information is essential for understanding the system's history, troubleshooting issues, and detecting unauthorized activities.