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When the first white men arrived in Samoa, they found blind men, who could see well enough to describe things in detail just by holding their hands over objects. In France, Jules Roman tested hundreds of blind people and found a few who could tell the difference between light and dark. He narrowed their photosensitivity(感光灵敏度) down to areas on the nose or in the finger tips. In 1960 a medical board examined a girl in Virginia and found that, even with thick bandages over her eyes, she was able to distinguish different colours and read short sections of large print.
Rosa Kuleshova, a young woman in the Urals, can see with her fingers. She is not blind, but because she grew up in a family of blind people, she learned to read Braille to help them and then went on to teach herself to do other things with her hands. She was examined by the Soviet Academy of Science, and proved to be genuine, Shaefer made an intensive study with her and found that, securel
A. To prevent Rosa from feeling the print.
B. To stop the reflection of heat.
C. To make things as difficult as possible.
D. To stop her from cheating.
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