A. Supplier Selection
B. Supplier Communications
C. Supplier Performance
D. Supplier Improvement
E. Supplier Certification, Partnerships, and Alliances
F. Supplier Logistics and Material Acceptance
By clicking on the link above you can see further context around the body of knowledge including the level of cognition this section of the CMQ/OE exam is written to. Additional resources regarding supply chain management can be found on the ASQ Website Supply Chain Management. For a more in-depth exploration of supplier related quality topics see the ASQ Customer-Supplier Division Website.
I am grateful for these resources posted in this thread because it is definitely outside of my realm of experience.