Metamerism invariably involves _____.: (A) A color difference between two objects under one or more illuminant(s), (B) One object having a lower chroma than another, (C) One object having a lower lightness than another, (D) A significant color change of one object as it moves from one illuminant to another
Answer is A. Metamerism is the phenomenon where a color match under a lighting condition appears different under a different lighting condition.