To determine a credible research source a historian should: read as much as they can on the subject
go to a reliable website
understanding the subject area better
look at the sources of the source

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