The correct answer is B. On kingship.
Thomas Aquinas was attributed to on kingship.
Thomas Aquinas was a catholic priest, doctor of the church and a dominican Friar from Italy.
In the areas where there was political theory, metaphysics, natural law and areas of ethics they opposed Thomas's idea of modern philosophy.
For those who study in priest hood they honour Thomas as a saint, speculative theology and and natural reason for his highest expressions.
In catholic church is one of the philosophers and theologians who were great.