GMAT Sentence Correction (SC) | Over the past twenty-five years the study of medieval archaeology

The logical meaning of the sentence:

Over the past 25 years, the study of X has prospered in Italy. This study has been backed by a journal, and numerous towns and regions up and down the peninsula have raised funds for the study to know their past.

A) 'which' modifies Italy and conveys the meaning that "Italy is backed by the campaign". This is not a logical construction. Moreover, "which...Archeologia Medievale" acts as a modifier and if we remove it we get a structure "...has
...

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