The best statement that explains the Catholic Church’s response to the Protestant Reformation, based on the summary of the Tridentine Creed, is:
The Church reaffirmed core Catholic teachings such as the Eucharist and the supremacy of the Church in interpreting the Bible.
This statement reflects the Catholic Church's position that emphasized traditional doctrines and the authority of the Church, which was a direct response to the challenges posed by the Reformation, particularly regarding the interpretation of Scripture and the sacraments like the Eucharist.