Answer:
Universalism
Step-by-step explanation:
Universalism: The term universalism is referred to as the theological and the philosophical concept that states a few specific ideas posses universal applicability or application. An important tenet in the concept of universalism is belief which is considered as a fundamental truth. It is considered as important as it reflects the shared characteristics between all humans and therefore it is a normative perspective.
In the question above, Tia was following the universalism ethical system.