The correct answer is C) Summa Theologica.
The other options of the question were A) The Permanent Philosophy. B) Confessions. D) The Consolation of Philosophy.
In Summa Theologica, St. Thomas Aquinas sought to reconcile faith and reason.
St. Thomas Aquinas (1225-1274) was an Italian priest of the Dominican religious congression that founding the influential Thomistic school that developed theological concepts in the Middle Ages. Written between 1265 and 1274, "Summa Theologica" has been one of the most important books for the Catholic Church that still today is part of the curriculum of religious studies for priests.