20 why would the portage railroad have been needed for a canal system? to deliver passengers to the site of the canal entrance to take the goods back up river after they were purchased used a special system to take loaded boats across high elevations it was the combination for owners to travel beside their wares

Used a special system to take loaded boats across high elevations

Explanation:

I found read about it in my History assignment rn. I can update when I turn it in :).

d. china

good luck

d is the best choice

you can talk about what you learned about them. and you can talk about what happened on you're journeys with them. and then you can put all of the thing you learned about them in you're diary.