Robert should look at the supplier's ESG policy. This stands for Environmental Social Governance. So covers both his requirements for community (social) and environmental factors.
ISO 9001 is about Quality Management and ISO27000 about Information Security so these are in-correct answers. An Anti-Slavery Policy would not discuss the environment.

In a restricted tender process, only pre-qualified suppliers are invited to bid, ensuring that participating suppliers have met necessary qualifications. This approach helps in managing high-value contracts by focusing on capable suppliers. Ethical and responsible sourcing in the public sector demands supplier pre- qualification to ensure compliance, transparency, and quality.

Governance of ethical and sustainable behaviour focuses on ensuring suppliers have the right systems, policies, and transparency measures in place. Reviewing insurance clauses ensures suppliers are prepared to manage liability and risks responsibly. Checking conflict of interest registers promotes transparency and prevents corruption. By contrast, NDAs protect confidentiality but are not primarily ethical governance tools, and simply checking "up-to-date policies" without context may not guarantee compliance. CIPS highlights governance mechanisms such as audits, policy reviews, and conflict registers as integral to monitoring ethical performance and ensuring accountability.
Reference: CIPS L4M4 Study Guide (v2), LO: "Implementation" - governance measures, monitoring supplier ethics.

Futures exchanges are used to trade commodities. It's when a buyer and supplier agree a price and deal for something in the future. For example a carrot farmer may agree to sell his carrots to Gary in 3 months time when they're finished growing. It's used when the product / commodity isn't ready yet.
It's also used for hedging and other complex financial stuff- but you don't need to know that yet. Commodities and Future contracts are a big part of L5M4 to warn you though. Futures Contract Definition: Types, Mechanics, and Uses in Trading (investopedia.com)

Incoterms describe who out of the buer and seller; organises transport and what type of transport this is, who pays for insurance, and who organises duty / tariff arrangements when the goods go through customs. See p.
131. Note- some students report a lot of questions on Incoterms in the exam, some say they only had 1. If you can, I'd learn them just to be safe.