PT 64 S1 Q17

Archaeologist: The mosaics that were removed fromZeugma, the ancient city ... ...

Which one of the following, if assumed, most helps to justify the reasoning in the archaeologist’s argument?
(A) The only considerations that bear upon the question of whether the mosaics should have been removed are archaeological.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2011 LSAT (PT 64): Logical Reasoning A