Final answer:
The selection between two potential suppliers with the same quality and prices should be based on the capabilities and flexibilities of the firms, as well as an outside evaluation.
Step-by-step explanation:
The selection between two potential suppliers with the same quality and prices should be based on the capabilities and flexibilities of the firms, as this will determine their ability to meet your specific requirements and adapt to changes in the future. An outside evaluation can also be considered to gather insights from industry experts or other customers who have worked with the suppliers before. Sales and marketing presentations can provide additional information, but they should not be the sole basis for decision-making.