Which of the following is the correct definition of cultural relativism?
选项：

A:The core principles and ideals upon which an entire community exists.
B:The belief that the culture of people serves particular needs and must be looked at in terms of the world the people inhabit.
C:The belief that one’s own culture is the main standard by which other cultures may be measured.
D:The belief that stresses the importance of respecting one’s parents and elders.