PT 65 S4 Q20

When teaching art students about the use of color,teachers should use ... ...

Which one of the following is an assumption required by the argument?
(A) Two pieces of paper of exactly the same color will have the same effect in a given context, even if they are of different textures.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Dec 2011 LSAT (PT 65): Logical Reasoning B