Is Moral Relativism Belief A or Belief B?

Belief A = a belief where EVERY moral principle can be destroyed by man.

Belief B = any other belief that's not Belief A.  In other words, a belief where there exists at least ONE moral principle that cannot be destroyed by man. 

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(Now, would it be that much of a stretch to say Belief A is moral nihilism and Belief B is some form of moral absolutism?)