28.What is the best title for the article?
(A)Ways to detect sources of your backache
(B)Never, never put your spine at risk
(C)How athletes have their spine injured
(D)Some myths of spinal cord injury

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統計： A(3), B(57), C(2), D(14), E(0) #1293271

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    Many athletes, b...
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spinal cord injury  ...
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