The correct answer is:
C. Artists used commonly understood symbols in their paintings.
The true statement about paintings of Flanders is that the artists used commonly understood symbols in their paintings.
Features of Flanders paintings
It became popular in the 15th to 17th centuries, in Belgium and in the Netherlands, whose characteristics stand out for the analysis of reality in a more empirical and comprehensive way, with the use of light as a unifying element of representation.
It was inspired by the ideological evolution of the observation of nature and the surface of the image, being the portrayal of the entire space in a detailed and symbolic way.