In colonial times, what was the fastest way to get from new york to philadelphia

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

letter a is the answer

the answer i chose to believe is 'harmony'