The Settlement and City Architecture of Ani Was Distinct for All

The settlement and city architecture of Ani was distinct for all of the following reasons except:​

A) ​It was built with major monumental architecture along the borders of the urban area instead of solely in the downtown center.
B) ​The city is geographically located in a triangular promontory within the Caucasus Mountain range.
C) ​Because of the diverse range of materials used to construct the monuments, the city is extremely colorful.
D) ​The city is surrounded by fortifications all along the neighboring mountain ranges, leaving it ringed in fortresses.