Answer:
c. oil paints.
Explanation:
Van Eyck's style comes from the International Gothic, something common in his time, but gradually he departs from this style when he begins to incorporate the naturalism and the realism in his paintings. This new thematic made him develop new techniques to achieve the aesthetics desired. In a naturalistic painting, where light is a constant presence, it is necessary to create the feeling of realistic luminescence, and the realistic models portraits by Van Eyck led him to develop the oil paint using the egg tempera. Through his developments in the use of oil paint, he achieved a new level of virtuosity and influenced several artists after him.
