In the following statements which one was not a contribution to Chinas archaeology personnel preparation? A、During 1980s, international explorers were becoming increasingly active in seeking treasures in the Nanhai. B、The underwater archaeological research laboratory dispatched personnel to study wreck research in Japan, the Netherlands, and the United States. C、In 1989, 11 archaeologists participated in the professional underwater archaeological training in Lianjiang, Fujian province. D、 1998-1999, 20 people attended the second underwater archaeological training course held in Ningbo, Zhejiang.