An Acceptable Use Policy (AUP) outlines the rules and guidelines for employees or users regarding the appropriate use of company systems, resources, and internet access. It defines permitted and prohibited activities, helping to mitigate security risks and establish clear behavioral expectations.
B). MNDA (Mutual Non-Disclosure Agreement) deals with confidentiality, not usage guidelines.
C). DRM (Digital Rights Management) controls access to copyrighted content.
D). EULA (End User License Agreement) pertains to software licensing, not internal policies.
Reference:
CompTIA A+ 220-1102 Objective 4.3: Explain common safety and environmental impacts and procedures.
Study Guide Section: Organizational policies - AUP, security best practices

The key requirements are (1) avoid expensive licensing fees and (2) keep files locally. Linux best matches both. Quentin Docter explains that open source software is "freer than free," meaning the application is free and the source code is shared, and he explicitly lists "OSs such as Linux" as open source examples. That directly supports the licensing-cost goal. By contrast, Windows and macOS are commercial, licensed operating systems.
Chrome OS often works best when users rely heavily on cloud-based services and synchronization, which conflicts with the customer's preference that "all files be kept locally" (even though local storage exists, Chrome OS is commonly positioned around cloud workflows). Linux supports fully local file storage and gives the organization control over storage location, backup choices, and offline access.
The All-in-One guide reinforces the idea that some developers (including Linus Torvalds for Linux) made software "freely available for everyone," highlighting Linux as a no-licensing-fee option compared with commercial licensing models. Therefore, the best recommendation is Linux (A).

Single sign-on (SSO)allows users to authenticate once and gain access to multiple systems without re-entering credentials, which significantly enhances user convenience while maintaining security.
FromQuentin Docter - CompTIA A+ Complete Study Guide:
"Single sign-on streamlines authentication by allowing users to log in once and access all authorized resources, reducing credential fatigue and improving security."

UPS batteries are heavy and often located at the bottom of racks to maintain balance. Safe removal requires the use of correct lifting techniques to avoid injury. OSHA and workplace safety standards emphasize ergonomic handling when dealing with heavy equipment.
A). Fire suppression readiness is important for fire safety but not specifically relevant to battery removal.
C). Antistatic bags are for electronic components, not heavy battery modules.
D). A face mask is not generally necessary unless there is a chemical leak, which is not indicated here.
Reference:
CompTIA A+ 220-1102 Objective 4.3: Explain common safety and environmental impacts and procedures.
Study Guide Section: Safe handling procedures - lifting techniques, battery handling

The correct answer is C. XDR (Extended Detection and Response), which is designed to provide holistic security visibility across endpoints, networks, servers, cloud workloads, and email systems. Unlike traditional endpoint-only solutions, XDR correlates data from multiple security layers to detect and respond to advanced threats.
According to the Quentin Docter - CompTIA A+ Complete Study Guide, XDR expands upon EDR by integrating telemetry from network traffic, firewalls, identity systems, and cloud platforms. This enables detection of threats that move laterally or originate outside a single host.
The Travis Everett & Andrew Hutz - All-in-One Exam Guide explains that XDR is specifically designed to detect attacks that bypass endpoint protections by analyzing network-level behavior, command-and-control traffic, and cross-system activity.
The Mike Meyers / Mark Soper Lab Manual contrasts XDR with other options: RADIUS is an authentication protocol, UAC is a local Windows privilege control, and antivirus focuses only on known malware signatures at the host level. None of those provide network-wide visibility and coordinated response.
Because the question explicitly mentions traffic outside the host and at the network level, XDR is the only technology designed to meet that requirement, making C the correct answer.