Answer :
Answer: D) the high cost of changing partners.
Explanation: The high cost of changing partners is often a disadvantage of the "few suppliers" sourcing strategy. The few suppliers sourcing strategy is one wherein companies rely on few suppliers in order to lower transaction and production costs, to keep materials and processes tightly regulated among others. It offers some advantages, some of which includes that suppliers are more likely to understand the broad objectives of the end customer ; there is creation of value by allowing suppliers to have economies of scale and the suppliers are often willing to provide technological expertise.