The correct answer is D. VPN.
A VPN (Virtual Private Network) is a service that allows a remote user to access network resources securely over the internet. A VPN creates an encrypted tunnel between the user's device and the VPN server, which acts as a gateway to the network. The user can then access the network resources as if they were directly connected to the network, without exposing their traffic to eavesdropping, interception, or censorship.
A VPN can provide remote users with access to various services on a company network, such as file and print services, client/server applications, and remote network administration1. A VPN can also protect the user's privacy and identity online by masking their IP address and location.
References:
*Remote Access to a Network - NETWORK ENCYCLOPEDIA, section "Remote access typically gives remote users access to the following services on a company network".

Using the device as a Wi-Fi hotspot, a failing battery, and too many open applications are the most likely causes of the cell phone getting hot. These actions require the phone to use more power and processing, causing it to heat up.

A burning smell on a desktop computer is a serious issue that indicates a hardware malfunction or failure. It can be caused by overheating, a faulty power supply, a malfunctioning motherboard, or a short circuit12. If left unchecked, it can damage the components, cause a fire, or harm the user.
The first thing the technician should do when troubleshooting a burning smell on a desktop computer is to unplug the computer from the power source. This will stop the flow of electricity and prevent further damage or fire. The technician should also wear protective gloves and eye wear to avoid contact with any hot or hazardous parts.
The other options are less likely to be the first step in troubleshooting, because:
*Locating a fire extinguisher is a good precaution, but it should not be done before unplugging the computer.
The fire extinguisher should only be used if there is visible smoke or flames coming from the computer, and only after unplugging it and ensuring that it is safe to do so.
*Calling the fire department is an extreme measure that should only be done if there is an actual fire that cannot be controlled by the fire extinguisher. It should not be done before unplugging the computer and trying to identify and fix the problem.
*Removing the desktop cover is a necessary step to inspect the internal components and find the source of the burning smell. However, it should not be done before unplugging the computer, as it can expose the technician to live wires and electric shocks.
For more information and tips on how to troubleshoot a burning smell on a desktop computer, you can visit these links:
*How to find the source of a burning smell in my computer?
*Burning Smell From PC? 10 Reasons Why It Could Happen

Explanation:

Metered utilization is a cloud feature that allows cloud providers to charge customers based on their actual consumption of resources, such as CPU time, storage space, bandwidth, or transactions.This enables customers to pay only for the resources they use, rather than a fixed or flat rate, which can reduce costs and increase efficiency. Metered utilization can also provide more transparency and accountability for both cloud providers and customers, as they can track and monitor their resource usage and billing. Reference:
https://partners.comptia.org/docs/default-source/resources/a-core-1-content-guide (page 97)