Ancient greek and roman arts were very impactful during the early renaissance. The ancient romans had made murals of broken glass and they called them Mosaics, they also had ivory works, metal workings ( jewelry,swords,etc.). Greeks were famous for textiles and their paintings.
Art is used as a form of expression. Greek artists included the ideas of reason, moderation, balance, and harmony, because it was what they believed in. The Greeks often glorified the idea of being useful, peaceful, and living in simplicity, which would explain why their art work was influenced by it.
C. show the horror in war
Hope it helps :)