Which of the Following Defines Supply Chain Partners

Which of the following defines supply chain partners?

A) The schedule for production activities, including testing, packaging, and preparation for delivery.
B) The product delivery processes and elements, including orders, warehouses, carriers, defective product returns, and invoicing.
C) The strategy for managing all the resources required to meet customer demand for all products and services.
D) The partners chosen to deliver finished products, raw materials, and services, including pricing, delivery, and payment processes, along with partner relationship monitoring metrics.