The correct answer is A) It is the only surviving architecture of the Inca people.
The significance of this location is that "it is the only surviving architecture of the Inca people."
We are talking about the great city of Machu Picchu, at the top of the Andean Mountains in Peru. The Incas were the largest and most important civilization in South America, in pre-Colombian times. Historians and archeologists suggest that Machu Picchu was built by Inca Emperor Pachacuti in the early1500s. Its fine polished walls are something to note in the impressive Temple of the Sun.