OG22请教

OG 22. The voluminous personal papers of Thomas Alva Edison reveal that his inventions typically sprang to life not in a flash of inspiration but evolved slowly from previous works.

(A)  sprang to life not in a flash of inspiration but evolved slowly

(B)   sprang to life not in a flash of inspiration but were slowly evolved

(C)  did not spring to life in a flash of inspiration but evolved slowly

(D)  did not spring to life in a flash of inspiration but
                had slowly evolved

(E)   did not spring to life in a flash of inspiration but
                they were slowly evolved

解释中：E contains the faulty passive and an intrusive they.

THEY的用法怎么错了呢？是不是一句话中有很多复数单词，所以指代不清呢？谢谢。

but后面有完整的主谓结构,也就是一个完整的句子.

一个完整的句子加上一个连词(but),那么前面一定要有一个逗号.

既然这里没有逗号, 那么意为着后面不是一个独立的句子, 主语应该和句子主语一致, 也就不需要这个they了.

所以OG说这里的they是intrusive.

对, S1 V1 O1, and/but S2 V2 O2.

    S V1 O1 and/but V2 O2