1. Most North Carolina ski resorts broadcast music onto the slopes; skiers can choose among hard rock, soft pop, and “beautiful music” slopes, there are no slopes without music.

(A) skiers can choose among hard rock, soft pop, and “beautiful music” slopes, there are

(B) because skiers can choose hard rock, soft pop, or “beautiful music,” there are

(C) however, skiers can choose among hard rock, soft pop, “beautiful music,” and

(D) although skiers can choose among hard rock, soft pop, and “beautiful music” slopes, there are（D）

(E) skiers can choose among hard rock, soft pop, “beautiful music” slopes, but

看过前人帖子，但还是不明白E项关键错在哪里。 是因为but后面跟了短语不对吗？还是but的转折位置不对？

As my understanding, there should be a sentence after "but". Also, E is not paralleled.