Which of the following is the main cause of the recall of Toyota in the U.S.？A．Engine prob
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Which of the following is the main cause of the recall of Toyota in the U.S.？
A．Engine problem.
B．Gas pedal problem.
C．The faulty brake system.
D．Not known.
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
事实细节题。新闻首句提到美国运输部长RayLaHood正在评估因油门踏板出现问题而被召回的数百万丰田汽车。可得知，此次丰田汽车被召回的主要原因是油门踏板出现问题，即B为正确选项。