Which of the Following Have Been Used to Show That

Which of the following have been used to show that face aftereffects are not the results of adaptation to low-level visual mechanisms?

A) Changing the size of the test faces from that of the adapting faces
B) Changing the colour of the test faces from that of the adapting faces
C) Comparing the build-up and decay of face and tilt aftereffects
D) Showing that face and tilt aftereffects are affected in different ways by subsequent adaptation to the test stimuli