PREP 07 2 94 请问一个run-on的问题 7.18考了, 麻烦大家了

龍之哀伤

Even though her career was cut short when she was in her prime and the fifteen recordings she made were disappointing artistically as well as technically, Olive Fremstad (1871-1951) has never been entirely forgotten by opera aficionados.
(A) though her career was cut short when she was in her prime and the fifteen recordings she made were
(B) though her career was cut short while in her prime, with the fifteen recordings she made
(C) as her career had been cut short when she was in her prime, with the fifteen recordings she had made
(D) with her career having been cut short when she was in her prime, and the fifteen recordings she made were
(E) with her career cut short while in her prime, and that the fifteen recordings she made were

答案是A, 但是PREP不止一次说过, and连接两个句子前面要有逗号, 请问下这里为什么没有?

龍之哀伤

谢谢

nemiah

这两个分句都在even though 引导，用逗号了就不对了吧。。

龍之哀伤

请问你是指从句吗? 从句间可以没有逗号?

nemiah

分句间有and连接就不算run on，没说必须要有逗号吧。。