The correct answer is C. The creation of the first known system of writing
Explanation:
The Sumer civilization or Sumerians were a civilization that developed in Mesopotamia around 4500 BC, this civilization is known as one of the first civilization in the world and recognized for its architecture, developments in mathematics and more importantly its writing system that was the first one in the world. This type of writing is known as cuneiform and was created based on clay tablets and blunt reeds, this was one of the most important achievements of the Summer civilization as it did not only allow people to record important events but was the beginning of literary forms such as poems and was followed by other writing systems such as the hieroglyphics in Ancient Egypt. Therefore, the statement that describes an achievement of the Sumer civilization is the creation of the first known system of writing.
