Curator: Critics have rightly claimed that removing the centuries-old grime ... ...

Curator: Critics have rightly claimed that removing the centuries-old grime from the frescoes of Michelangelo will expose them to acids formed by the combination of water vapor in human breath with pollutants in the air. Notwithstanding this fact, the restoration should continue, for the frescoes in their present condition cannot be seen as they appeared when painted by Michelangelo. Which one of the following principles, if valid, most helps to justify the curator’s reasoning?
(A) The decision as to whether an artwork merits restoration or not should depend on its greatness as judged by aesthetic standards alone.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2012 LSAT (PT68): Logical Reasoning B