单项选择题

According to the theory of "risk homeostasis", some traffic accidents result from______.

A．our innate desire for risk
B．our fast and reckless driving
C．our ignorance of seat belt benefits
D．our instinctive interest in speeding
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单项选择题
By saying ... statistically canceling out the benefits that the seat belt confers (Line 8, Para. 2), the author means______.
A．wearing seat belts does not have any benefits from the statistic point of view
B．deaths from wearing seat belts are the same as those from not wearing them
C．deaths from other reasons counterbalance the benefits of wearing seat belts
D．wearing seat belts does not necessarily reduce deaths from traffic accidents
单项选择题
In his research, Gerald Wilde finds that technological development and increases in safety standards______.
A．have helped solve the problem of such high death rate
B．have oddly accounted for mortality rates in the past century
C．have reduced mortality rates for violent and accidental deaths
D．have achieved no effect in bringing down the number of deaths
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