单项选择题

The rapidly expanding number of automobiles threatens a further escalation in the emission of carbon dioxide（）

A．由于汽车工业的迅速扩展，二氧化碳的排放量也进一步增加。
B．汽车数量迅速增长，这意味着二氧化碳排放量会进一步增加。
C．汽车数量的迅速增长可能会造成二氧化碳排放量的进一步增加。
D．汽车工业的迅速扩展威胁到二氧化碳排放量的进一步控制。

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