複選題37.(A) In contrast, since the 1970s in earthquake-prone areas of China, authorities have encouraged people to report unusual animal behavior, and Chinese scientists have an impressive track record in predicting earthquakes. (B) To explore the potential for animal-based warning systems would cost a small fraction of current earthquake and tsunami research. (C) This explanation seems unconvincing, however, as there would have been tremors all over South-east Asia.