The Church’s response to feudalism included initiatives aimed at addressing the violence and instability that characterized the feudal system. The most relevant response from the options provided that was specifically meant to counteract what the Church saw as the “general failure of feudalism” is the Truce of God.
The Truce of God was a movement initiated by the Church during the medieval period that sought to limit the violence associated with feudal conflicts. It established periods during which warfare was prohibited, particularly on weekends and holy days, encouraging knights and lords to avoid fighting during these times. This was part of a broader effort by the Church to bring a degree of order and moral conduct to what it perceived as the disorder of feudal life.
In summary, the correct answer is the Truce of God.