OG 12 的矛盾解释，请教！！！

请看道题：
OG-12 第107 题
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, is ?nding uses in medicine, archaeology, and criminology.

(A) Originally developed for detecting air pollutantsa technique called protoninduced Xray emission, which can quickly analyze the chemical elements in almost any substance without destroying it,
(B) Originally developed for detecting air pollutantshaving the ability to analyze the chemical elements in almost any substance without destroying it, a technique called proton-inducedX-ray emission
(C) A technique originally developed for detecting air pollutants, called protoninduced Xray 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,

key: A
OG解释：
in A the nonrestrictive clause which … is correctly placed next to emission and set correctly from the rest of the sentence by a pair of commas.
in C relative clause introduced by which.... incorrectly and illogically modi?es emission.
A 和 C 是同样的“emission, which”为什么A的which 结构是对的，C的which 就是错的呢!!!

问：which 在GMAT 中是否只能指代它紧靠的名词呢，如该题的A选项，只能指代emissions而不能指代proton-induced X-ray emission,如果是的，那么A怎么能对呢？？？