Official Explanation
This problem is best solved starting from the last blank. Certain “tenets” (principles important to a group of people) are not necessarily accepted as fact (“gospel”) even by those who really believe in the practice of psychoanalysis. These people are “seasoned practitioners,” experienced in psychoanalysis. “Quarrelsome factions” are the opposite of the intended meaning and while “beneficiaries” could work, the sentence does not provide any clues to justify use of the word “esteemed.” Next, move to the second blank. The experts may question “even tenets” that are deemed central to the overall philosophy. The best match is “critical” (crucial). “Immaterial” (unimportant) and “anathema,” used to describe something that is cursed or loathed, do not fit the idea of something that is crucial to the philosophy. Finally, the second sentence provides the necessary clues for the first blank: psychoanalysis is a subject of debate even among those who practice it; it is “rife with contention.” The practitioners do not “ridicule” it or find it “devoid of substance” (lacking substance). Rather, they disagree with some of the principles even as they continue to follow the overall philosophy.
Answer: C,D,I