19. As the etched lines on computer memory chips have become thinner and the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have vastly increased.

(A) the chips’ circuits more complex, both the power of the chips and the electronic devices they drive have

(B) the chips’ circuits more complex, the power of both the chips and the electronic devices they drive has

(C) the chips’ circuits are more complex, both the power of the chips and the electronic devices they drive has

(D) their circuits are more complex, the power of both the chips and the electronic devices they drive have（B）

(E) their circuits more complex, both the power of the chips and the electronic devices they drive have

这里的As the etched lines on computer memory chips have become thinner and the chips’ circuits more complex 怎么也看不懂，etched lines 是引导了一个句子，the chips‘circuits怎么就没有谓语呢？

这样不就不平行了吗？

谢谢大家了！！