i need full explantion for this true /false question

A. In supply management, the cost / price benefits associated with sourcing in developing countries are an insignificant motivation for remaining competitive in an increasingly global environment. B. The use of a full-service trading company may actually result in a lower total cost for international purchases compared with performing each activity individually. C. Trade shows are often one of the worst ways to gather information on many suppliers at one time. D. Whether the purchase transaction is with a domestic or offshore producer, there are certain common costs