Answer:
The answer is: Because in ancient Christianity, the penance imposed on confessed sins was severe.
Explanation:
The Doctrine of Indulgences is a concept of Catholic theology closely linked to the concepts of sin, penance, remission and purgatory.
Although it is a secondary theological concept, indulgences played a central role in the history of Christianity.
The first antecedents of the practice of indulgences date back to the third century. In ancient Christianity, the penance imposed on confessed sins was severe, and that corresponding to sins considered especially serious, such as apostasy or homicide, was also public, so the demand for indulgences at that time increased.
The answer is: Because in ancient Christianity, the penance imposed on confessed sins was severe.