Experiments with Inverted and Distorted Vision Show That

Experiments with inverted and distorted vision show that

A) adaptation to inverted vision is not possible for most humans.
B) active movement speeds adaptation in humans.
C) adaptation to the inverted vision only allowed the human subjects to perform simple movements, such as walking for short distances, not more complex maneuvers.
D) human subjects adapt best when they remain motionless and can visually study their environment.