单项选择题

Which of the following is NOT mentioned as a factor of accidents in this passage

A．Mood.
B．Tiredness.
C．Carelessness.
D．Weather.
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单项选择题
Which do you think would be the best title for the passage
A．Accidents and Anxiety
B．How Accidents Are Caused
C．Human Factors in Accidents
D．How to Prevent Accidents on Roads and in Factories
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