Answer:
When it builds conformity and cohesiveness
Step-by-step explanation:
Ethnocentrism is a philosophical term that describes the position or assessment of an individual about a particular culture different from his or her own culture while using the standard of his own culture to assess the foreign culture.
Hence, the correct answer is ethnocentrism can be functional for a society when it builds conformity and cohesiveness. This implies that, if ethnocentrism does not bring the usual conflicts, it can be functional for the societies involved.