Which statement about Louise Nevelson's sculptures is true?
A. a single color and repeated box shapes create unity.
B. They have a limited assortment of forms.
C. They have complementary color schemes.
D. The objects are more important than the shadows they create.

A. a single color and repeated box shapes create unity

Explanation:

"Louise Nevelson" was an American sculptor who made her artwork with mostly wood pieces. These pieces were portrayed like they all belong together, particularly in a monochromatic unity (that is, in black and white). She made her sculptures through "abstract" means. For her, "black" color means "totality" because it is the most aristocratic color. Using only these colors allows her to have discipline in doing art.

So, this explains the answer.