A procurement manager should agree to purchase IT equipment from a specific vendor during a sales promotion only if the equipment adds value to the enterprise. This means that the equipment supports the business goals and objectives, meets the current and future needs of the stakeholders, and delivers benefits that outweigh the costs and risks. The procurement manager should also consider the quality, reliability, compatibility, and security of the equipment, as well as the vendor's reputation, service level, and warranty.
The other options are not the best justification for a procurement manager to agree to purchase IT equipment from a specific vendor during a sales promotion. The IT benefit surpasses the business benefit from the purchase is not a valid justification, as it implies that the IT department's interests are more important than the enterprise's interests. The procurement manager should align the IT strategy with the business strategy and ensure that the IT equipment supports the enterprise value creation. The business profit surpasses the IT cost for the equipment is not a sufficient justification, as it does not account for other factors such as quality, performance, functionality, and risk of the equipment. The procurement manager should evaluate the total cost of ownership (TCO) and return on investment (ROI) of the IT equipment, not just the initial purchase price. The product is offered at the lowest price is not a convincing justification, as it does not guarantee that the equipment is suitable for the enterprise's needs and expectations. The procurement manager should not compromise on quality, functionality, or security for a lower price.
For more information on IT procurement and value creation, you can refer to these web sources:
IT Procurement Manager Job Description w/ Role & Responsibilities
IT Governance: Definitions, Frameworks and Planning
What is Governance in Procurement? Its Model
What is IT governance? A formal way to align IT & business strategy

Section: Volume B
Explanation

A business case is a document that justifies the initiation and continuation of a project based on its expected benefits, costs, risks, and alignment with the strategic objectives of the organization. If a project is experiencing a cost overrun, meaning that it has exceeded its initial budget, it is important to re-evaluate the business case to determine whether the project is still viable and worth pursuing. Re-evaluating the business case can help to identify the root causes of the cost overrun, assess the impact of the overrun on the project's value proposition, and decide whether to continue, modify, or terminate the project. Reviewing the IT investments, reorganizing the IT projects portfolio, and reviewing the IT governance structure are not the most important tasks to perform in this situation. They are more likely to be part of the portfolio management or governance processes that should be done regularly or periodically, not in response to a specific project issue. Moreover, they do not directly address the problem of the cost overrun or its implications for the project's feasibility and desirability. References := What is a Business Case?, How to Write a Business Case, Project Cost Overruns - Reasons, How to Prevent and Manage

According to the ISACA paper on IT Governance Reporting1, the most important information to include in IT governance reporting to the board of directors is the critical risks that IT faces or poses to the enterprise. Critical risks are those that have a high likelihood and impact, and that could threaten the achievement of the enterprise's strategy, objectives and goals. Critical risks could include cyberattacks, data breaches, regulatory compliance violations, IT project failures, IT service disruptions, IT resource shortages, etc. The board of directors should be aware of the critical risks, as well as the actions taken or planned to mitigate them. The other options are not as important as critical risks, as they are more related to the operational or tactical aspects of IT, rather than the strategic or governance aspects.