According to the passage, 1997 witnessed _________. A. the largest number of summits on the subject of climate change B. the most important summit on climate change taking place in Kyoto, Jap
According to the passage, 1997 witnessed _________.
A. the largest number of summits on the subject of climate change
B. the most important summit on climate change taking place in Kyoto, Japan
C. the highest attendance by representatives from 180 industrialized countries
D. widespread concern about climate change