单项选择题

Questions 23 and 24 are based on the following news. At the end of the news item, you will be given 10 seconds to answer the questions.
Now, listen to the news.

Who is going to meet in the city of Potsdam

A.Environment ministers of developed countries.
B.Environment ministers of developing countries.
C.Environment ministers of G8.
D.Environment ministers of GS, developed countries, and developing countries.