两题求助，百思不得其解

leslieguo

1.　Research dring the past several decades on the nature of language and the processes that produce and make it understandable has revealed great complexity instead of underlying simplicity.　（新东方补充教材265）


A) that produce and make it understandable has revealed great complexity instead of underlying simplicity


C) by which it is produced and understood has revealed not underlying simplicity but great compexity


为什么选A，不选C？


2.　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. (新东方补充教材299）


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


为什么选B，不选C？are 可以省略吗？

ecsniffer

1、http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=14209


2、the chips' circuits （have become）more complex，相同部分可以省略

leslieguo

非常感谢！！