In terms of its relations with neighboring powers, the Song
(A) met their ultimate demise at the hands of the Mongols.
(B) was able to maintain a permanent dominance over the Jin Dynasty of the Jurchens.
(C) reconquered the northern region controlled by the Uighurs.
(D) learned from the mistakes of the Tang and avoided a similar fate.
(E) conquered Japan, the first time that this had happened.
Answer: A.