单项选择题

As far as children are concerned, second-hand smoke can only have bad effects on them.

A．孩子们担心买二手烟会对他们有坏的影响。
B．就孩子们而言，被动吸烟仅仅对他们有一点影响。
C．对孩子们而言，被动吸烟危害很大。
D．对孩子们而言，被动吸烟对他们只有坏的影响。
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