孔子(公元前55l～公元前479)，中国历史上伟大的教育家、思想家和政治家，儒家思想(Confucianism)的创始人。他创办私学，招收并教育弟子(disciple)，创立了以“仁”为核心的道德学说。相传他有弟子三千，曾带领部分弟子周游列国。孔子的言论及其与弟子们的对话被汇集编纂成《论语》(The Analects of Confu-cius)，千古传诵。自汉代以后，儒家思想成为两千多年来中华传统文化的主流，影响极为深远。

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.