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In the following sentence, I am not sure whether I can omit "which was". Omitting is suggested to me by a famous grammar software. Wouldn't "developed" then (after omitting) refer to environment? I want develop to refer to "principle". Or is it possible? Which rules apply?
This paper presents a principle for such environments, which was developed during and evaluated through a study.
If you leave out which was you introduce an ambiguity as the sentence
This paper presents a principle for such environments, developed during and evaluated through a study.
leaves open the question of whether the principle or the environments were the thing(s) being developed. So it is safer to leave it in.
I would have said in a study but that is just personal style.
