求助一道语法题！万分感谢！

亲爱的敌人

Five fledgling sea eagles left their nests in western Scotland this summer, bringing to 34 the number of wild birds successfully
raised since transplants from Norway began in 1975. !
(A) bringing
(B) and brings
(C) and it brings
(D) and it brought
(E) and brought
楼主在A和E中纠结，最终选了E，正确答案A。排除A的原因是因为觉得left和bringing不能同时发生。难道刚刚离开就导致了wild birds数量增加吗？求大神解释

咖啡印象

这个题之前版上讨论过，po出链接，供LZ了解

http://forum.chasedream.com/thread-598671-1-1.html