Final answer:
The first cities began in Mesopotamia between the Tigris and Euphrates rivers, an area that amounts to the world's first complex urban centers and is referred to as the Cradle of Civilization.
Step-by-step explanation:
The first cities began in Mesopotamia, specifically between the Tigris and Euphrates rivers. This region, historically known as the Cradle of Civilization, is where urban centers and complex societies first emerged. Mesopotamia, which translates to 'land between the rivers' in Greek, included the region we now know as Iraq. The combination of the fertile soil from the river valleys and the need to manage water resources led to technological innovations, cooperative irrigation projects, and eventually the rise of cities.
Among the world's first great cities, Sumer was established in the southern part of Mesopotamia around the fourth millennium BCE. The Sumerians developed many technological advancements, including a writing system known as Cuneiform. The early city-states in this region were complex and involved significant advances in governance and administration related to managing agriculture and the unpredictable flooding of the rivers.
Therefore, the correct answer to where the first cities began is A) Mesopotamia, between the Tigris and Euphrates rivers.