Which option identifies the next major step to happen in the following scenario? When the early Mesopotamian people settled along the banks of the Tigris and Euphrates rivers, they quickly realized that the soil was very fertile and learned to plant seeds purposely and harvest them, giving them a surplus of food.

The Mesopotamian people created a writing system with numbers to track harvests.
The Mesopotamian people traveled far and wide to trade goods with other peoples.
The Mesopotamian people created new jobs such as writing and construction.
The Mesopotamian people built large temples to thank the gods for their food.