问题详情

Which of the following is NOT true？
A．There were many changes than the railway in the late 20th century America.
B．The development of railroads made people travel wherever they wanted.
C．Changes brought conveniences to American people.
D．The advantage of railroads is only to shorten the traveling time.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！