How should the legacy of John Brown be remembered today?

What does channing say that americans boast about

Which answer best describes the u.s. national road? it ran from atlanta to baltimore and followed the railroad. it ran from new york to chicago and was made from wooden planks. it ran from massachusetts to ohio and ran parallel to the canal system. it ran from maryland to illinois and was made using macadam construction.

Which application of a new technology can be attributed to an invention of thomas edison?