Which of the following is supportive of the claim that perception is in the "eye of the beholder" and not in the stimulus itself? a) When presented with ambiguous letters, the visual system uses context to determine their identity b) A traffic light can be identified even if partially occluded by a tree branch. c) Whether someone remembers having seen an ambiguous figure (e.g., the face-vase) before depends on whether the interpretation of the figure is the same. d) all of the above