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.

It would either be B or D but I'd go with B because it's not a comparison question

D) Heavy loads of goods could travel by boat more easily then if pulled by horses.  

Explanation:

Even though they were used to carry things around too, there's only so much that a horse can pull. Eventually, it becomes unpractical to rely on horses to carry really heavy loads. A boat, though, can do this in a much more practical way.

the answer to your question is:

strong-mayor system

boundary is what it refers to hope this

explanation: