Correct Answer: B
Explanation:
The clue is in the word �reconcile�. In order to reconcile (bring together opposing ideas/people etc) there should be two opposing items. Since one item of the pair is �theoretical underpinnings� the word used to describe �experience� must be the opposite of �theoretical�. Hence, �empirical� (found by experiment or experience) and �practical� are the best choices. [arcane = obscure; obtuse = slow to understand, mentally dull]