The answer is C: Tenochtitlan.
According to the Aztec tradition, the Aztecs would find the land where to build their Empire where they would find an eagle eating a snake on top of a cactus (which is the flag emblem of current day Mexico). As the legend goes, this happened on an island on Lake Texcoco (nowadays Mexico City) on an uncertain date; however most scholars claim Tenochtitlan was founded on 1325 CE.