OG11th－Diagnostic Test－40，which指代对象问题

小胡子乖乖

In 1995 Richard Stallman, a well-known critic of the patent system, testified in Patent Office hearings that, to test the system, a colleague of his had managed to win a patent for one of Kirchoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics.

A
B. laws, which was an observation about electric current first made in 1845 and it is
C. laws, namely, it was an observation about electric current first made in 1845 and
D. laws, an observation about electric current first made in 1845, it is
E. laws that was an observation about electric current, first made in 1845, and is

关于B不行的原因，og说which is ambiguous because it could refer to one or to laws

灰常的不明白，which后面跟的是单数，怎么可能修饰law呢？

事实上og两百多道题目里面，比这更变态更让人摸不着头脑的强制修饰，跳跃指代都有很多。。。

小胡子乖乖

没人帮忙看一下吗？

这些题目真的很经典。

紫苏

说真的，og11的SC解释都很垃圾，楼主不要看了。

B的话关键AND IT IS中it指代不清