What did the Catholic Church believe about simony and the sale of indulgences? A. Both practices were serious sins that went against Catholic teaching.

B. Church officials knew they were being practiced, but did not think many people were involved.

C. Both practices were considered sins, but the church needed the money they generated.

D. Church officials quickly found and punished those involved, putting an end to both practices

A. . Both practices were serious sins that went against Catholic teaching.

Explanation:

At that time, indulgences is considered as a 'remissions' from previous sins. Christians believe that God is the only one that has the right to forgive the sins. This is why selling/buying indulgences are considered as an act of sin.

By monetizing indulgences, many Catholics believed that The churches has put their way in the position where they believe they can act on God's behalf to erase other people's sins.