OGtao套题第40道

请大虾帮解决一下的困惑：

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 Kirchhoff's laws, an observation about electric current first made in 1845 and now included in virtually every textbook of elementary physics.

A laws, an observation about electric current first made in 1845 and

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, it is

D laws, an observation about electric current first made in 1845, and it is

E laws that was an observation about electric current, first made in 1845, and it is

1这里的谓语是testified，宾语是hearings后面的that从句吗？那从句翻译出来好像都不通哦？里面的又来一个插入语to test the system干嘛？

2有没有人帮翻译成汉语？

3另外，hearings在这里是什么意思？

万分感谢！！