Answer:
the flagrant hawking of indulgences in German lands by the papal agent Johannes Tetzel
Step-by-step explanation:
Luther was especially angered by the flagrant hawking of indulgences in German lands by the papal agent Johannes Tetzel, who is credited with the phrase, "When the coin in the coffer rings/the soul from purgatory springs." For Luther, this monetization of faith was an abuse of church practice in his jurisdiction that he was duty-bound to report to his superiors.