A buyer is only interested in working with suppliers who have strong Environmental and Social...

Explanation

A supplier who follows the CIPS Code of Conduct is more likely to meet the buyer's needs is the correct answer.

The other options are wrong:

1) Compliance with Codes of Conduct from professional bodies is optional. E.g. CIPS - no organi-sation is forced to comply with CIPS.

2) Unethical behaviour is not impossible to detect, it may be difficult but with correct due diligence and things like audits it's completely possible

3) ISO 14001 is quality management so is irelevent.