When was the transcontinental railroad started?

How did many delegates from northern states at the constitutionalconvention view slavery?

Which answer best describes an advantage of shipping goods by canal? a) most towns would rather have canals then noisy railroads b) goods could travel very fast downstream in the canal system c) traveling by boat is a much more relaxing way to transport goods. d) heavy loads of goods could travel by boat more easily then if pulled by horses.

Someone who accepted the beliefs of social darwinism would have also agreed with which of these statements?