Answer:
The correct answer is C. Fayum portraits were made of encaustic on wood panels.
Step-by-step explanation:
The Fayum portraits are the modern designations of a form of realistic painted portraits on wooden tables attached to mummy sarcophagi from Greco-Roman Egypt. They belong to a form of face painting, one of the most highly regarded forms of art in the classical world. In fact, the Fayum portraits are the only paintings from this tradition that have been preserved for posterity in large numbers.
They were made in encaustics on a wooden panel and attached to the deceased mummy. Most of the portraits originate from the Egyptian city of Fayum, in what was then a Roman province, where the warm and dry climate has preserved the paintings into modern times.