Answer:
c simony and the sale of indulgences
Step-by-step explanation:
Huss did not accept papal supremacy, but only the person of the Christ - not Peter - as head and head of the Church, considering the Gospel "only law."
Because of that, he did not tolerate the idea that the church could create procedures, and specially to sell them, that would save a soul or diminish their punishment after death.
He was so very convicted about it that he was burned for his point of view. He died defending what he believed.