Which of the following is NOT correct according to the passage?

A、The developing countries believe that sending students to the industrialized countries is a good way to meet their own needs for modernization.
B、The South American countries have been sending students to developed countries since the 1920s.
C、Many people trained abroad remain in the developed countries instead of coming back to serve their home countries.
D、The International Organization for Migration successfully helped more than 1, 600 professionals to return to their own countries in a single year.