What is the basis of the argument that there is no such thing as "realistic" art?

A$.$ There are not enough paint colors available to create the full color range we can see in real life.

B$.$ No one can know for sure what is real, and therefore nothing can be real.

C$.$ All art is an imitation of reality and therefore cannot in itself be real.

D$.$ No artist has ever been talented enough to create something that looked realistic.