The architecture style is different. romanesque churches came first. they were bulky, strong and had really thick walls. their windows were regular roman arched shapes. they usually have lower ceilings and not much light inside.
Gothic cathedrals came later. they have pointed arches, lots of tall windows for light stained glass and flying buttresses to help support the higher and thinner walls.
The answer is B. To disrupt the South's ability to trade
To drive the Muslim Turks from the holy land
The Europeans wanted economic gain sorry that is all my brian could rake up.