Which of these factors had a direct influence on the spread of postclassical empires?
a.Expansion of transcontinental trade routes
BThe unification of Europe under the Roman Empire
CEuropean exploration of the Western Hemisphere
DThe establishment of most major monotheistic religions
a.Expansion of transcontinental trade routes
BThe unification of Europe under the Roman Empire
CEuropean exploration of the Western Hemisphere
DThe establishment of most major monotheistic religions