How did the development of cuneiform enable scholars to learn about the ancient sumerians?

These were the choices I found on the internet:
A. Cuneiform allowed details about Sumerian culture to be recorded.
B. Cuneiform led to the invention of technology that preserved Sumerian art.
C. Cuneiform allowed for the preservation of Sumerian artifacts
D. Cuneiform led to Sumerian culture laying the groundwork for Western civilization

In this case, it would be letter A - Cuneiform allowed details about Sumerian culture to be recorded. The cuneiform script is one of the earliest systems of writing and was invented by the Sumerians. It allows the scholars to learn something from the records of the ancient Sumerians because of this writing system.