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6

A muscle tear.
B. A serious knee injury.
C. A brain injury caused by medical errors.
D. A brain injury caused by a sudden blow.

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7

A. Young athletes who may have a concussion should be taken off the field as gently as possible.
B. Young athletes who may have a concussion should be kept where they are until health care professionals arrive.
C. Only health professionals are qualified for evaluating and caring for concussions.
D. A doctor's written approval is necessary for an athlete with a concussion to return to the sport.

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