Final answer:
An ethnocentric orientation assumes that each foreign market is unique and needs to be addressed individually, based on the belief that one's own culture is superior.
Step-by-step explanation:
A firm with an ethnocentric orientation assumes that each foreign market is unique and needs to be addressed individually. This means that the firm believes its own culture and approach are superior to others and should be imposed on foreign markets. Ethnocentrism can hinder international business success because it overlooks cultural differences and may not effectively meet the needs of diverse markets.