What is the main characteristic of the concept of human dignity?

I- It is a universal concept that applies to all human beings.
II- It is a relative concept that can be weighed against other norms.
III- It is a vague and undefined concept in the legal field.
IV- It is a fundamental concept that serves as the basis for human rights.
a) Only I and IV are correct.
b) Only II and III are correct.
c) Only IV is correct.
d) Only I, III, and IV are correct.