10。 Young female ballet dancers and gymnasts sometimes fail to maintain good eating habits caused by the desire to be as thin as possible.
(D) Because they desire to be as thin as possible, young female ballet dancers and gymnasts sometimes fail to maintain good eating habits. (E) Young female ballet dancers and gymnasts sometimes fail to maintain good eating habits because they desire to be as thin as possible. 给出的答案是d), 其实e)中的they也不会造成混乱指代,优先指代主句主语,而且e)不会造成主次颠倒, 为什么d) 优选呢?恳请指点。