In laser printers, the fuser unit is responsible for melting the toner onto the paper using heat and pressure.
If the toner rubs off easily, it's a clear sign the fuser is failing or not heating properly. Replacing the fuser will ensure the toner bonds correctly to the paper.
* Option B (Drum): Transfers the image, but doesn't fuse the toner.
* Option C (Developer roller): Applies toner to the drum - wouldn't cause toner to rub off.
* Option D (Discharge lamp): Prepares the drum for a new image; not related to toner adhesion.
CompTIA A+ Core 1 Exam Objective Reference:
* Objective 3.7: Given a scenario, troubleshoot common printer problems.

Satellite internet is the most widely available internet connection type, as it does not depend on cables or wires. It can reach remote areas that lack infrastructure for other types of internet connections1. References: Satellite Internet

Cross-platform virtualization would be the best solution for running Windows software on a computer running macOS. This involves running a virtual machine (VM) on the macOS computer, which emulates a Windows environment and allows the Windows software to be installed and run within the VM.
Cross-platform virtualization allows a computer running macOS to run Windows software. It involves creating a virtual machine on the macOS computer and installing a Windows operating system on it.
References: CompTIA A+ Certification Exam Guide, Ninth Edition, Chapter 1

The user should check the display settings on the computer and set them to extend/duplicate. This will allow the computer to send the video signal to both the laptop screen and the projector. If the display settings are set to only show on one screen, then the projector may not detect any source. According to the CompTIA Core1 objectives, one of the common display issues is no image on screen. A troubleshooting guide for projectors also suggests checking the display settings as a possible solution for no source found error.

The correct answer is D. Graphics card.
A graphics card is a component that handles the processing and rendering of 3D graphics on a PC. A graphics card can significantly improve the performance and quality of 3D design software, as it can handle complex calculations and display high-resolution images faster than the CPU. A graphics card can also support features such as ray tracing, anti-aliasing, and texture mapping, which can enhance the realism and detail of 3D models.
A: Motherboard. This is not a correct answer. A motherboard is a component that connects and communicates with all the other components in a PC. A motherboard does not directly affect the performance or quality of
3D design software, unless it is incompatible or outdated with the other components.
B: CPU. This is not a correct answer. A CPU is a component that executes instructions and calculations for various programs on a PC. A CPU can affect the performance and quality of 3D design software, but not as much as a graphics card. A CPU is more important for tasks such as compiling, encoding, or multitasking, which are not specific to 3D design.
C: Power supply. This is not a correct answer. A power supply is a component that converts AC power from the wall outlet to DC power for the PC components. A power supply does not directly affect the performance or quality of 3D design software, unless it is insufficient or faulty to provide enough power for the other components.
E: Memory. This is not a correct answer. Memory is a component that stores data temporarily for fast access by the CPU and other components. Memory can affect the performance and quality of 3D design software, but not as much as a graphics card. Memory is more important for tasks such as loading, saving, or switching between programs, which are not specific to 3D design.
Reference: System requirements | Substance 3D Designer1, 12 Best Free 3D Modeling Software (For Beginners) 20232, System requirements for Autodesk 3ds Max 20213.