What are two ways the crusades changed Europe politically

In Europe, the Crusades led to economic expansion; increased trade and use of money, which undermined serfdom and led to prosperity of northern Italian cities. They led to increased power of the monarchs, and, briefly, to increased power of the papacy. In the Middle East, Muslim regimes united to fight the invaders and, under Saladin, began to reunify the region.

Explanation:

for your : )

b. florence

d. milan