Analyze the map below and answer the question that follows.
A political map of Mexico. Regions of the map are labeled 1, 2, 3, and 4. 1 is in Northern Mexico near the Baja California peninsula. 2 is in Central Mexico. 3 is in Southern Mexico. 4 is in the Yucatan peninsula.
Image by NASA

In which region on the map above did the ancient city of Teotihuacan exist?
A.1
B.2
C.3
D.4