Albrecht Dürer was the
German artist who published theoretical writings and manuals on the technical
concerns of painting.
Dürer was a painter,
printmaker, and theorist of the German Renaissance who reinforced by his artworks
with theoretical treatises, which involve principles of mathematics,
perspective, and ideal proportions. He published two theoretical books – “Four
Books on Measurement” (dimension) and “Four Books on Human Proportion”.
I think it's "A" because the artist draws/illustrate their content. A painting can describe what is going through the painter's mind, feeling, how they see the world through every stroke and mark they make on the blank canvas.
I think the other answers are wrong because a painting/illustration are based off of the artist.