In a Study Described in the Critical Thinking Box "Is

In a study described in the Critical Thinking box "Is Hypnosis a Special State of Consciousness?" hypnotized volunteers were instructed to look at a photograph of gray rectangles and mentally add color to the photograph, so that they would perceive colored rectangles. When they did so, what did PET scan images reveal about their brain activity?

A) Activity increased in the color regions of the brain.
B) Activity decreased in the color regions of the brain.
C) There was no change in brain activity.
D) Brain regions involved in color perception did not change, but regions known to be activated when people are lying or being deceptive showed a sharp increase in activity.