[求助]请问大全229题 which用法

cloudy

OG229题
The colorization of black-and-white films by computers is defended by those who own the film rights, for the process can mean increased revenues for them;many others in the film industry, however, contend that the technique degrades major works of art, which they liken to putting lipstick on a Greek statue.
A.同上
E. likening it to putting lipstick on a Greek statue
OG上解释：the relative pronoun "which" refers not to the technique but to the noun phrase immediately preceding it, major works of art"只是想问，which 是指代离它最近的名词还是指代它前面名词中的一个？？
一直搞不清楚，希望得到大虾们指教：）