In an experiment, subjects with uncorrected vision were asked to identify sets of letters on charts located at different distances from the subject. This experiment yielded an unexpected result. Subjects who most successfully recognized letters from all of the charts experienced much less eye muscle contraction than those subjects who could recognize letters from nearby charts only.

Which of the following best accounts for the results of this experiment?


(A) People with better vision have eye shapes better adapted to focusing on objects at different distances with minimal contraction of their eye muscles.
(B) A person's eye muscles contract less when the person is reading stationary letters than when the person is looking at moving objects.
(C) Vision-correcting glasses can allow people to recognize distant objects even if their eye muscles are unable to contract.
(D) The subjects who were most successful in recognizing letters were least likely to experience eyestrain-induced headaches.
your answer
(E) Eye muscles contract when the brain recognizes the object on which the eye is focused.