Final answer:
The Council of Trent affirmed the importance of sacraments and religious art, the authority of scripture and tradition, and introduced reforms such as prohibiting the sale of indulgences.
Step-by-step explanation:
The Council of Trent was an assembly of high officials in the Church that met from 1545 to 1563 to address the challenges posed by Luther and to effect necessary reforms. Regarding church discipline, the Council affirmed the importance of all seven sacraments, the necessity of religious art, and the authority of scripture and the teachings and traditions of the Church. They also introduced reforms such as prohibiting the sale of indulgences and limiting bishops to holding office in only one bishopric.