We are living in ______ world of developing, ______ world where any problem can be solved in a peaceful way.

A．the; a

B．a; the

C．the; the

D．a; a

某参观团根据下列条件从A，B，C，D，E这5个地方中选定参观地点：①若去A地，则也必须去B地；②B，C两地中至多去一地；③D，E两地中至少去一地；④C，D两地都去或者都不去；⑤若去E地，一定要去A，D两地．那么参观团所去的地点是哪些？______．