At the start of the Civil War, the

A.! South had a massive reserve of cash.

B.! South had more combat-age males.

C.! South had more and better railroads.

D.! North was unified by a commitment to end slavery.

E.! North had a much more substantial economy.

E) North had a much more substantial economy.

Explanation:

The economy of southern states was basically tied to the production and exporting of cotton. Cotton was America's largest export, but it was sold only as raw materials, it wasn't processed.

While northern states had a much broader railroad system, a healthier financial system (87% of all financial institutions), manufacturing facilities and large urban centers. Even the factories that processed cotton from the south were located at northern states.