Under article of the constitution, the laws of congress and all treaties are the law of the land.                a.  vii      b.  iv      c.  iii      d.  vi

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.