When the civil war
a southerners believed they could win by capturing washington, d. c.
b northerners could not find enough volunteer for military service.
c both sides were prepared for a long and drawn-out war.
d both sides believed the war would be quick and relatively painless.

One drawback of voluntary trade is that it a.requires two groups to use a common language b.can make one group dependent upon another for necessary goods c.doesn't occur unless there is a shortage of goods for at least one group d.forces groups to rely on themselves to produce all the goods they need