Answer :
Answer:
B. They invented a complex system of writing still used today.
Explanation:
The Mesopotamian civilization created the cuneiform system that is a system of writing. It consisted of pressing forms into soft clay producing wedge-like impressions that represented words-signs. All great Mesopotamian civilizations used this system of writing. The Cuneiform system changed along with time, with time the number of characters that were used was reduced to simplify and clarify the system.