One important impact of the mongol expansion
across asia and europe was the
(1) increased authority of the kievan princes
(2) rise in trade along the silk roads
(3) introduction of hinduism into chinese
culture
(4) maritime exploration of the arabian seacoast

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