A capital expense is the cost of acquiring or making improvements to fixed assets that have a useful life of more than one year1. A building purchase is an example of a capital expense, as it is a long-term investment that increases the value of the company's assets2. Building lease, maintenance, and insurance are not capital expenses, as they are recurring or short-term costs that do not increase the value of the company's assets3.

Option C shows a graph that most likely represents the observed relationship in this scenario. The graph shows a learning curve, which is a graphical representation of the relationship between a learner's performance on a task and the number of attempts or time required to complete the task. The learning curve theory proposes that a learner's efficiency in a task improves over time the more the learner performs the task. In this case, the IT intern was able to complete more set-ups in less time as they gained more experience and proficiency over the two-week rotation12

A communication plan details the communication requirements, including methods, frequency, and stakeholders for each type of update. According to CompTIA Project+, this plan is essential for ensuring effective and organized communication throughout the project.

To validate that a project has been successfully completed. The intent and purpose of a project closeout report is to validate that a project has been successfully completed and to summarize the goals, objectives, and outcomes of the project, as well as the lessons learned and the feedback from stakeholders. A project closeout report is a document that is submitted at the end of a project to officially conclude it and release the resources and contracts involved. It is useful for evaluating the project's success and improving the performance of future projects12

This answer is based on the best practice of issue management in project management, which is to identify, analyze, prioritize, and resolve issues that affect the project performance, scope, schedule, quality, or budget12. The first step in this process is to rate the severity of the impact the issue has on the project, which involves assessing the likelihood and consequences of the issue, and assigning a rating or score to the issue based on a predefined scale or criteria34. By rating the severity of the impact, the project manager can determine the urgency and importance of the issue, and decide the appropriate course of action to address the issue56. Rating the severity of the impact is better than the other options because:
Buying a replacement for the faulty equipment may not be feasible, cost-effective, or timely, depending on the availability, price, and delivery time of the equipment. It may also require approval from the project sponsor or other stakeholders, and may affect the project budget or scope7.
Getting the maintenance team to resolve the issue may not be possible, depending on the nature and extent of the malfunction, the skills and availability of the maintenance team, and the warranty or service contract of the equipment. It may also take time and resources to diagnose and fix the problem, and may cause further delays or disruptions to the project8.
Escalating the issue to the project sponsor may not be necessary, depending on the severity and complexity of the issue, and the authority and responsibility of the project manager. It may also create unnecessary alarm or confusion among the project stakeholders, and may undermine the project manager's credibility or autonomy9.
Reference = CompTIA Project+ Certification Study Guide, CompTIA Project+ Certification Exam Objectives, What is Issue Management?1, Issue Management Process2, How to Assess the Severity of Project Issues3, How to Prioritize Project Issues4, How to Replace Faulty Equipment in Project Management5, How to Manage Equipment Maintenance in Project Management6, How to Escalate Issues in Project Management7