What four issues dominated american politics from the mid 1870s to the end of the nineteenth century?

Why might congress have had difficulty paying the war debt after the american revolution

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.

What are some inventions during the han dynasty?