Which cities in arabia became part of the islamic empire during the time of muhammad?

The supreme court serves what important function in the u. s. federalgovernment?

Which empire was called "the sick man of europe? "

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.