National parks in China refer to（）（multiple choice）
选项：

A:The main purpose is to protect the national representative natural ecosystem;
B:Specific land or sea area for scientific protection and rational utilization of natural resources;
C:The most important natural landscape in China, the most unique natural landscape, the most outstanding natural heritage, and the most abundant biodiversity.;
D:The protection scope is large and the ecological process is complete;
E:Global value;
F:A national symbol with high national identity.