Comprehensive and Detailed In-Depth Explanation: Many modern laptops have both an integrated GPU (built into the CPU) and a dedicated GPU (such as NVIDIA or AMD). The system may default to the integrated GPU to save power, which results in poor gaming performance. The technician should manually set the game to use the dedicated graphics card to resolve the issue. * A. Overclock the RAM - Incorrect. While overclocking RAM can improve performance slightly, it does not resolve GPU-related gaming lag. * B. Enable NIC teaming - Incorrect. NIC teaming improves network bandwidth and has no effect on gaming graphics. * D. Activate CPU hyperthreading - Incorrect. Hyperthreading improves multitasking but does not directly impact gaming graphics performance. Reference: CompTIA A+ 220-1102, Objective 1.8 - Performance Optimization and Troubleshooting