The answer is letter c. Postmodern.
postmodern works are often playful in spirit, a reaction against the unrelenting seriousness of much modernist art. Postmodern is an art the ironically and playful treat objects.
Because of the similar color schemes and subject matter, this painting is an example of a principle of art called harmony.
Could you please include a picture of the artworks so that you can get a reliable answer.