问题详情

A train traveling at a speed of 80 mph enters a tunnel that is 0.5 miles long. The length of the train is 0.25 miles. How long does it take for all of the train to pass through the tunnel, from the moment the front enters, to the moment the rear emerges？
A．One minute.
B．Two minutes.
C．Three minutes.
D．Four minutes.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！