The Council of Trent were several gatherings that took place between 1545 and 1563 and involved the Catholic church main representatives and those from European nations that had stood under its influence. Its principal result was the start of the Counter Reformation against Luther's Reformation and against the emergence of protestantism.
From the point of view of the faith, the council defined the teachings of the supporters of protestantism as heresies, and issued certain clarifications to the doctrines of the Catholic church.
The answer is going to be A
Going through the great depression
