[Reference: https://study.com/academy/lesson/data-storage-formats-digital-forensics-devices-types.html, Types of Data in Forensic Investigations:, Persistent Data: Stored on hard drives, such as files, logs, and browser history., Volatile Data: Stored in RAM, includes running processes, active network connections, and encryption keys., Relevance to Forensic Investigations:, Persistent and volatile data provide critical evidence during investigations, covering both historical and live system activity., Why Not Other Options:, A & B: RAM and unallocated space are useful but do not encompass the full spectrum of evidence., C: Slack space and browser cache are subsets of persistent data., Reference:, Study.com on Data Sources in Forensics​, , ]