【单选题】Which of the following is NOT the effect of the Crusade?
A.
They weakened the feudalism, and andincreased the power of papacy and also caused its decline
B.
They opened the door ti the East for Europeans and promoted the development of economy in Europe.
C.
They also liberlized the minds of the Arabs, helping them to be exposed to more knowledge that they had never known since the Western civilization at that time was more advanced.
D.
The discovery of the Americas was the epoch- in history as the direct result of the Crusades.