Suppose That a Psychologist Loans You an Art Book and Says

Suppose that a psychologist loans you an art book and says that the book includes some interesting ambiguous figure-ground pictures. You should expect to see

A) a random arrangement of black-and-white figures.
B) a photo of real-life figures, rather than black-and-white shapes.
C) a picture in which a specific region is the central figure one moment, but this region becomes the background the next moment.
D) a picture that has at least two subjective contours.