Answer:
B.. clay tablets
Explanation:
The Sumerians are officially the first civilization in the world. This civilization developed in the valley of the rivers Tigris and Euphrates. One of the major achievements of the Sumerians, and there were a lot, was the writing system. The writing system of the Sumerians has been given the name Cuneiform. The Cuneiform has been written on tablets made by clay, as the clay is easy to write on. There are thousands of the Sumerians clay tablets that witness for their lives, ideas, religion, but unfortunately they have not been studied a lot, and the majority of the scientists don't seem to be very interested about it. Also, a big problem is that the majority of these ancient tablets are kept in terrible conditions, where there is moist, and they are not taken care of properly, so lot of them are getting damaged, and the legacy of the Sumerians as rapidly disappearing.
