The Two Fundamental Factors Driving the High Medieval European Economy

The two fundamental factors driving the high medieval European economy were:

A) population growth and an increasingly efficient market for goods.
B) long-distance trade and investments in church building.
C) technological innovations in agriculture and new styles of ships that could carry more.
D) newly discovered precious metal deposits and the resulting inflation.
E) long-distance trade and the newly designed ships to carry the trade goods.