Serious economic problems in rome included all of the following except
a.
low taxes
c.
inflation
b.
scarce food
d.
unemployment

i think it would be reparing roads  

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."