Which of the Following Does NOT Characterize Migration Patterns

Multiple Choice

Which of the following does NOT characterize migration patterns?  

A)  Migration plays an important role in the economies of developing countries. 
B)  A major source of foreign exchange in some countries is the money sent home by migrants. 
C)  Migration provides a valuable safety valve for poor countries. 
D)  The best and brightest professionals are very unlikely to migrate to developed countries.