单项选择题

Motor cyclists should wear helmets to shield them from injury．（）

A. 摩托车手应戴上头盔，以掩盖他们免遭伤害。
B. 摩托车手应戴上头盔，保护他们远离伤害。
C. 摩托车手应戴上头盔，保护自己免受伤害。
D. 摩托车手应戴头盔，保护自己可远离伤害。

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