Answer:
A belief that one's ethnic group is superior to that of another.
Step-by-step explanation:
Ethnocentrism may be defined as the act to give opinions and the judgement on the other cultures and society. The one culture are considered superior than the other's culture.
The ethnocentrism do not consider or belief in other culture. The culture is considered superior on the basis of the language, custom, behavior and religion. No equality of the culture is considered in the case of the ethnocentrism.
Thus, the correct answer is option (d).