The statement that is true of the agreements of the Council of Trent is: Selling indulgences was forbidden.
Explanation:
1. The Council of Trent was a major event in the Catholic Church's Counter-Reformation efforts to address the Protestant Reformation.
2. One of the key reforms enacted by the Council of Trent was the prohibition of the practice of selling indulgences.
3. Indulgences were certificates that could be purchased to reduce the amount of punishment one would undergo for sins. This practice had been a point of contention and criticism by reformers like Martin Luther.
4. By forbidding the selling of indulgences, the Council of Trent aimed to address corruption within the Church and reinforce the significance of genuine repentance and faith in obtaining forgiveness.
5. While the Council of Trent reaffirmed the authority of the traditional teachings of the Catholic Church and did not endorse tolerance of Protestant beliefs, it did make reforms to certain practices, including the prohibition of selling indulgences.