Answer: Cultural Relativism
Explanation:
According to the given question, the cultural relativism is one of the individual person values, morals, ethics and beliefs depending on their own culture and each person has their own points of views on the basis of their cultural values and the environment.
The importance of the cultural relativism is that it helps in understanding other person's point of views in an much better way.
According to the given scenario, the public relation manager in a multinational firm is using the cultural relativism for defending an organization's actions.
Therefore, Cultural relativism is the correct answer.