Answer:
b. farmland was fertile and water was nearby.
Step-by-step explanation:
These two factors allowed crops in Mesopotamia to grow extremely well. In turn, this fact allowed civilization to develop in this region. Mesopotamia was irrigated by two rivers: the Tigris and the Euphrates. These two rivers provided a source of irrigation. Moreover, they provided drinking water. This location was privileged enough to allow a large population to develop.