Martin Luther posted Ninety-five Theses on the church door to publicly criticise the misuse of indulgences.
Answer: Option C
Explanation:
The ninety-five theses were posted by Martin Luther bearing a detailed list of Academic arguments pertaining to moral theology. He was against the use of plenary indulgences as practised by members of the clergy.
The clergy used these indulgences to diminish the level or amount of punishment in purgatory, in lieu of the sins attributed against them.
He believed that the indulgences blinded Christians from the true form of repentance with respect to the sins committed by them and this in turn reduced compassion and mercy with in their hearts.