GMAT Sentence Correction (SC) | Re: Because of less availability and greater demand for

The official explanation that choice C brings out a cause and effect relationship is illogical. Please note the word, arguably. It is still debatable whether the town is the best-preserved medieval town. While so, how can we take that it was granted a status of World Heritage. Does anyone give a site a heritage status, because it is still argued to be whether best preserved or not.
In addition, a World Heritage title is given not because a site is well maintained but because it is ancient.

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