Final answer:
Martin Luther viewed Johann Tetzel as an embodiment of the Church's exploitative practices, particularly the selling of indulgences. His Ninety-five Theses initiated the Protestant Reformation, which was rapidly disseminated by the printing press, challenging the Catholic Church's practices and leading to widespread religious change.
Step-by-step explanation:
Kohann Tetzel was a salesperson who sold indulgences on behalf of the Catholic Church. Indulgences were documents that people could purchase to absolve themselves of their sins and ensure their place in heaven.
Luther saw this practice as corrupt and believed that salvation should be achieved through repentance and faith alone. His Ninety-five Theses initiated the Protestant Reformation, which was rapidly disseminated by the printing press, challenging the Catholic Church's practices and leading to widespread religious change.