Explanation:

The question is about Insider Risk Management forensic evidence collection in Microsoft 365 E5 (Microsoft Purview).
# Step 1 - Which devices are supported?
According to Microsoft documentation, forensic evidence collection for insider risk investigations is supported only on:
Windows 10
Windows 11
It is not supported on:
macOS
Android
iOS
# Reference: Forensic evidence collection in Microsoft Purview Insider Risk Management
# So, only Device1 (Windows 11) and Device2 (Windows 10) qualify.
# Step 2 - What preparation is needed?
For forensic evidence to be collected, supported devices must:
Be onboarded to Microsoft Purview (via Microsoft Defender for Endpoint integration).
Have the Microsoft Purview client installed.
This enables capture of user actions such as file copies, USB transfers, printing, etc., to provide forensic evidence for insider risk alerts.
# Correct option: Onboard the devices to Microsoft Purview and install the Microsoft Purview client