Explanation:
correct answer is "Overclocking" and "Reduce CPU Clock speed"
CPU is at 4.5 Ghz when normal is 3.2 Ghz. Overclocking too much can cause freezes, and this is a gaming computer sothe user probably took it too far. http://blog.logicalincrements.com/2018/12/4-troubleshooting- tips-overclocking-pc/

A valid public IP address must fall outside the private IP address ranges:
10.0.0.0 to 10.255.255.255
172.16.0.0 to 172.31.255.255
192.168.0.0 to 192.168.255.255
66.157.195.20 is outside these ranges, making it a public IP address.
Why Not A, C, D: These IPs fall within private IP address ranges.
CompTIA A+ Exam Reference: Core 1 (220-1201), Section 2.6, IP addressing.

Ultra HD (UHD), also referred to as4K UHD, has a resolution of3840x2160. It's four times the resolution of standard 1080p (Full HD), offering more screen real estate and sharper images.
Option A (1920x1080):Full HD (FHD), not UHD.
Option B (2048x1080):DCI 2K - used in cinema, not common for Ultra HD.
Option D (7680x4320):Known as 8K UHD, not standard Ultra HD.
CompTIA A+ Core 1 Exam Objective Reference:
Objective 1.7: Compare and contrast display technologies and their features.

Comprehensive and Detailed Explanation From Exact Extract:
A firewall allows for detailed traffic control, including blocking outbound connections while allowing inbound ones. This is contrary to typical security setups, but it can be configured via advanced firewall rules.
Reference: CompTIA A+ Core 1 220-1201 Official Study Guide, Section: Firewall ConfigurationFirewalls can allow inbound traffic and deny outbound connections based on configured rules.

A sandbox is an isolated virtual environment, often used for testing code or software safely without affecting the host system.
From CompTIA A+ 220-1101 Official Study Guide, Objective 3.7 - Virtualization:
"A sandbox provides an isolated environment, often implemented as a virtual machine, to safely test applications or code." Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 3: Virtualization CompTIA Exam Objectives 220-1101, Domain 3.7