Nike should purchase it's raw materials from organizations that meet ISO 9000 standards.
Step-by-step explanation:
ISO 9000 is the international standard for quality and resource management employed according to the World trade organisation and thus has an international approval that is recognizable all over the world.
Nike as a leading and trusted brand across the world for footwear must keep i care that they meet the quality standard that will be accepted worldwide and meet the highest standards of the buyers justifying the popularity of their products which is ensured by the certification of ISO 9000.