One achievement of st. thomas aquinas was

a becoming a bishop at a young age

b serving as a professor at the imperial court of milan
c translating the scriptures from latin into medieval french
d reconciling aristotle's logic with principles of the roman catholic faith

Good Morning!
 
One of the greatest feats of St. Thomas Aquinas was to interpret the writings of Aristotle in order to reconcile it with the Christian faith. An example is Aquinas's reading of the Soul, similar to the idea of Aristotle: it would be the meeting of soul and mind, being the form of the body. The soul, therefore, would have no moral implications, since it is an ideal and preexistent form, coming from God.
 

d reconciling Aristotle's logic with principles of the Roman Catholic faith

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The answer is professionals such as attorneys.