How many voters in the presidential election of 1860 had taken an oath of allegiance to the united states

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

keeping a cash reserve because cash flow is the the movement of money through a company and if it just sits there, it wont the movement