What is the speed limit of the train？A．50 miles an hour.B．89 miles an hour.C．96 miles an h

What is the speed limit of the train？

A．50 miles an hour.

B．89 miles an hour.

C．96 miles an hour.

D．112 miles an hour.

请帮忙给出正确答案和分析，谢谢！