It Is Not the Case That If Aesthetic Values Are

Multiple Choice

It is not the case that if aesthetic values are objective, then we must treat them as such. So, aesthetic values are objective just in case it is not the case that we must treat them as such.
-Working backward from the conclusion of this argument, which of the following is the most likely justification of the last step of the derivation?

A) Impl
B) DM
C) DS
D) Equiv
E) Cont