Minimalism, a trend that coexisted with Pop, emphasized a continuation of the exploration of nonrepresentation and the idea that a painting or sculpture is primarily:

A. an illusionistic space or window to look into.
B. an expression of the energy and vitality of the artist's mark.
C. a statement of the artist's psyche.
D. a physical object.
E. an expression of the sublime nature of reality.

D
The minimalist Donald Judd wrote, "The thing as a whole, its quality as a whole, is what's interesting."