The administrator should use RAID 0 for a video-rendering workstation at minimal cost. RAID 0, also known as striping, is a RAID configuration that splits data evenly across two or more disks, without parity information, redundancy, or fault tolerance. RAID 0 has the following advantages and disadvantages:
* High read/write performance: RAID 0 can increase the data transfer rate by using multiple disks in parallel. This can improve the speed and efficiency of video rendering, which involves processing large amounts of data. RAID 0 can also reduce the latency and seek time of the disks, as the data is distributed across multiple spindles.
* Maximum drive storage utilization: RAID 0 can use the full capacity of the disks, without wasting any space for parity or mirroring. This can lower the cost and increase the storage space for the workstation.
For example, if two 500 GB disks are used in RAID 0, the total capacity of the array will be 1000 GB.
* No redundancy or fault tolerance: RAID 0 does not provide any protection against data loss or disk failure. If one disk fails, the entire array will fail and the data will be unrecoverable. Therefore, RAID 0 should only be used for non-critical data that is backed up elsewhere, or for temporary files that can be recreated.
References:
* Standard RAID levels - Wikipedia1
* RAID Levels and Types Explained: Differences and Benefits of Each2
* RAID Level Comparison Table | RAID Data Recovery Services3

The user's smartphone is losing its charge rapidly and feels thicker than it was when new. Both of these symptoms point towards a bad battery.
A bad battery loses its ability to hold a charge, leading to rapid draining. Additionally, a bad battery can physically swell, which explains why the phone feels thicker.
Malware infection, damaged charge port, and poor connectivity are unlikely causes for both the rapid draining and the increased thickness.
References
CompTIA A+ Certification Core 1 220-1101 Study Guide, Chapter 2: Mobile Devices, Section 2.2 Mobile Device Batteries
https://www.comptia.org/training/books/a-core-1-220-1101-study-guide

After resolving the immediate issue (reactivating server credentials), verifying system functionality ensures the solution works as intended and the user can now access the shared drive. This step is a part of the CompTIA troubleshooting methodology:
* Identify the problem.
* Establish a theory of probable cause.
* Test the theory to determine the cause.
* Establish a plan of action.
* Implement the solution.
* Verify full system functionality.
* Document findings, actions, and outcomes.
* Why Not B (Document the findings): Documentation comes after verifying the system works.
* Why Not A (Escalate the issue): Escalation is unnecessary since the problem was resolved.
* Why Not C (Perform backups): Performing backups is unrelated to verifying credential functionality.
CompTIA A+ Exam Reference: Core 2 (220-1102), Section 3.1, troubleshooting methodology.

A router is a device that connects one or more networks, such as a home or small office network, to the internet. It allows multiple devices to share a single internet connection and provides network address translation (NAT) to enable communication between the devices on the local network and the internet. A hub, Ethernet gateway, or wireless access point does not provide this functionality.
A router is the most likely device to be used to connect one or more devices to the internet in a SOHO. A router can provide network address translation (NAT), firewall protection, and other features that are important for securing and managing a network. References: CompTIA A+ Certification Exam Guide, pg. 355

RAID 0 is a disk array configuration that splits data across two or more disks without parity or mirroring.
RAID 0 provides the best I/O performance because it allows parallel read and write operations on multiple disks. RAID 0 also provides the most storage capacity possible because it does not use any disk space for redundancy. However, RAID 0 does not provide any fault tolerance and increases the risk of data loss if any disk fails.
References: The Official CompTIA A+ Core 1 Student Guide (Exam 220-1101) eBook, page 252