Ethan, a forensic investigator, has been assigned to investigate a computer system suspected of being...

Option B. Prefetch is the correct answer because CHFI v11 explicitly identifies Prefetch Files as an important Windows artifact source. The blueprint includes Extracting Additional Windows OS Artifacts and specifically mentions Identifying TOR Browser Artifacts: Command Prompt, Windows Registry, and Prefetch Files , showing that Prefetch is a recognized source for evidence of program execution.

In Windows investigations, Prefetch artifacts help examiners determine whether an application was executed on the system, and they can support timeline analysis by showing execution-related traces. That makes Prefetch especially valuable when the goal is to identify whether suspicious or malicious software ran on the machine.

The other options are not the standard Windows artifact location used for this purpose. Process Dumper refers more to tooling than a system directory. Rp.log and Change.log.x are not the well-known Windows execution-trace artifact being tested here. Therefore, under CHFI operating-system forensic objectives, the most appropriate place to examine for traces of executed applications is the Prefetch area.