Reasons to outsource include; 'overheads can be kept as effective as possible' and 'the reduction in the need to continually invest in new machinery'.
When you outsource, you transfer the costs of overheads to the supplier and it is their responsibility to buy new machinery as and when is required. For example if you outsource cleaning, the cleaning company is responsible for replacing the hoovers and floor cleaner The other two options would be reasons to keep something 'in-house'.

Incorporating sustainability and environmental criteria into procurement decisions is essential for promoting responsible sourcing practices.Consolidated deliveryrefers to combining multiple shipments into a single delivery, which can significantly reduce the carbon footprint associated with transportation. By minimizing the number of deliveries, organizations can decrease fuel consumption and emissions, aligning with environmental sustainability goals.
This practice is particularly relevant in the procurement of IT supplies, where frequent, small deliveries can be consolidated to improve efficiency and environmental performance. Evaluating suppliers based on their ability to provide consolidated deliveries demonstrates a commitment to sustainable procurement practices.
References:
CIPS Study Guide: Ethical and Responsible Sourcing - Study Guides - CIPS Quizlet: CIPS L4M4 Ethical and Responsible Sourcing Flashcards

Accepting an invitation under such circumstances would violate ethical standards, as it could create a conflict of interest. Ethical sourcing and procurement practices require impartiality, and any perceived favoritism or bias can harm the organisation's integrity.

Modern slavery and human rights are social sustainability issues. Under the triple bottom line (environmental, social, economic), the social dimension covers labour rights, working conditions, equality, and compliance with modern slavery laws. Responsible sourcing requires buyers to integrate such social criteria in supplier prequalification to prevent unethical practices from entering supply chains. Environmental criteria cover impacts like carbon and waste; economic focuses on cost and competitiveness; quality addresses technical performance. Including modern slavery checks at the prequalification stage reflects due diligence and ensures alignment with legal and ethical obligations.
Reference: CIPS L4M4 Study Guide (v2), LO: "Concepts" - triple bottom line; ethical sourcing and social responsibility.

The correct answer is 'no - added value may change from one company to another'.
Added value is very subjective. What one person thinks is excellent added value, another may not rate highly.
For example one buyer may consider a supplier having good brand reputation as added value, but another might not care.
The other no answer is incorrect because added value can be tangible or intangible. Tangible means you can touch and see it and intangible means you can't.