Which is not a reason the middle ages ended?

the crusades made people turn to a new way of life.

people being able to make their own money in towns and changed the feudal system.

loss of confidence in the leaders of the church

people kept the same way of life in the feudal system.

People being able to make their own money in towns and changed the feudal system.

The feudalism system was destroyed following the deaths of black people in multitudes. This created a high demand for labor and the lords didn't have much hold over the peasant who left to find high wages jobs.  

The peasant now had some sort of freedom to choose their place of employment. Since, the lords slaved people mainly in the field or land, after the death of black people, the land was left desolate with not many laborers.