Which of the following is NOT one of the reasons why the developing countries are losing

A. Many professionals did not feel comfortable in their home countries after they returned home.
B. "Temporary return" programs encouraged professionals to work in their home countries for short periods.
C. The new laws of the international market encourage knowledge transfer.
D. The professionals from the developing countries have been trained in fields where they could not apply their knowledge to the best advantage in their home countries.