问题详情

What can be inferred from this passage？
A．Before railroads were built, people were too lazy to leave home for other places.
B．Before time was standardized, one man"s time was always one hour and half later than another"s.
C．Railroads changed people"s learning habits as well.
D．More things were created in the 19th century than in the 20th century of America.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！