In procurement, the difference between SOLE source Seller and the SINGLE source Seller is:
a. The SINGLE source is the only provider that exists for the product or service; the SOLE source list has competitors but is recognized by the Buyer as the preferred supplier
b. The SOLE source vendor has no other clients
c. The SOLE source is the only provider that exists for the product or service; the SINGLE source list has competitors but is recognized by the Buyer as the preferred supplier
d. The SINGLE source vendor has no other clients