The correct answer is C) works of literature.
The epic of Gilgamesh is one of history's oldest surviving works of literature.
We are referring to the oldest piece of literature known by man. The Epic of Gilgamesh tells the story of King of Uruk, Gilgamesh, and his adventures. This story dates back to the times of the oldest civilization on Eart: the Sumerians. These people settled in the between the Tigris and Euphrates Rivers, in the Middle East region, of what today is Iraq.
The other options of the questions were A) ziggurats, B) civilizations. D) trade routes.
