I believe the answer is A but i could be wrong, during the Civil war it made it easier for them to speak and talk to each other during that time sending goods and messages across the united states.
Hope this helps.
To learn about the foods and the importance of papyrus I’m not sure about the third but maybe the clothes and it is not marriage customs I can say 100% and as well I don’t see a river so I don’t think it’s that either
I believe its true but if not , my mistake