How did the ideas and actions of the Protestant Reformation change Christianity’s nature and status?

The Protestant Reformation started with the publication of Martin Luther's 95 Theses on 1517. This movement began as a social criticism of different controversial maneuvers of the Catholic Church, such as the sale of indulgences and the abuse of the clergy, evolving towards a proposal for reform in Roman Catholicism from the change in various points of the doctrine of the Catholic Church, based on what Luther understood as a return to the sacred scriptures.

The result of the Protestant Reformation was the division of the so-called Church of the West between Roman Catholics and Protestant reformers, originating Protestantism.

your list doesn't mention any of them at all.

and what does "these" mean anyway ?

the correct answer for the first is d