Are the statements about the effects of railroads in the late 1800s true or false?

The expansion of railways lowered the cost of shipping goods.
✔ true
Railroad mileage increased in the West, reducing the effects of settlement on American Indians.
✔ false
The building of the railroads changed the environment of the West.
✔ true
The Transcontinental Railroad was completed before the Civil War ended.
✔ false