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Originally developed for directing air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destorying it, is finding uses in medicine, archaelogy, and criminology.
(A) Originally developed for detecting air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Orignially developed for detecting air pollutants, having the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton-induced X-ray emission
(C) A technique originally developed for detecting air pollutants, called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(D) A technique originally developed for detecting air pollutants, called proton-induced X-ray emission, which has the ability to analyze the chemical elements in almost any substance quickly and without destroying it,
(E) A technique that was originally developed for detecting air pollutants and has the ability to analyze the chemical elements in almost any substance quickly and without destroying the substance, called proton-induced X-ray emission,
Solution:
First, this is the longest question I have ever met, so I will simplify a little bit. Here proton-induced X-ray emission is the subject.
A: "(opening modifier), (noun) (modified by necessary descriptive phrase)
B: "(opening modifier), (modifer), (noun) (modified by necessary descriptive phrase)
C: "(Noun), (modifier), (modifer), which"
D: "(Noun), (modifier), (modifer), which"
E: "(Noun), (modifier), (verb), (noun)
so we....only can go with A
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