Sentence Correction (SC) | Re: In 1995 Richard Stallman, a well-known critic of the patent system, te

I had the same question on (E) after reading GMATNinja's post, but thanksGMATNinja for clarifying it andVIGHNESHKAMATH for asking this. I think there is one more reason to eliminate (E), but I am not so sure. Let me share my rationale below. Can you please confirm if it is correct?

(E) laws that was an observation about electric current, first made in 1845, and is now included in virtually every textbook of elementaryphysics .

What is the highlighted verb phrase parallel
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