GWD里一道语法题为什么这样选！！大家来说说！！

puyanli

GWD-TN-13里面的语法题，这道题为什么选A不选C呢？

Research during 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.

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

B. of producing and understanding it have revealed not underlying simplicity but great complexity

C. by which it is produced and understood has revealed not underlying simplicity but great complexity

D. by which it is produced and understood have revealed great complexity rather than underlying simplicity

E. by which one produces and understands it have revealed great complexity instead of underlying simplicity

benjaminsandro

是选C的呀............

ukyo2003

建议发帖还是考虑大多数人的阅读习惯，1、正常字体；2、下划线

Research during 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.
Research (during some time) (on A ="the nature of language" and B="the processes + modifier") has revealed something (转折).
A. that produce and make it understandable has revealed great complexity instead of underlying simplicity
B. of producing and understanding it have revealed not underlying simplicity but great complexity
C. by which it is produced and understood has revealed not underlying simplicity but great complexity
D. by which it is produced and understood have revealed great complexity rather than underlying simplicity
E. by which one produces and understands it have revealed great complexity instead of underlying simplicity

A和C我觉得语法都对，主要是语意的区别，他们的的区别：1、主动>被动；2、意思可能不同
A. the processes produce language and make language understandable
C. language is produced by the processes and is understood by the processes，我第一次选是选C的，但是分析到这里我觉得应该选A了

另外我挖了一下坟，我觉得这道题太老了，如果这10年考过就不会还有这样的不清晰的情况，没有讨论的价值。