Which statements are true?
选项：

A:Ethnocentrism is nagetively judging aspects of another culture by the standars of one's own culture.;
B:Ethnocentrism involves the view that people of other cultures are different from me. ;
C:Ethnocentrism regards all cultures as equals and judges other cultures by using its own culture as a frame of reference.;
D:Ethnocentrism is the technical name for the view of things that one's own group is the center of everything and all others have to be scaled with reference to it.