单选题 The primary purpose of the passage is to

• (A) compare a philosopher's system of dramatic principles with that of the author's
• (B) enumerate one philosopher's view of the principles underlying good drama
• (C) analyze the similarities and dissimilarities between the various dramatic principles at work in Greek drama
• (D) contrast one philosopher's dramatic principles with those of the tradition that preceded him
• (E) demonstrate the wisdom and longevity in one philosopher's dramatic principles