The Shang Dynasty Is Especially Useful for Historians Because It

The Shang Dynasty is especially useful for historians because it

A) produced the first written sources, which provide much of what is known about early Chinese civilization.
B) left a large repository of agricultural artifacts.
C) was the first legitimate dynasty.
D) drained the flood waters that made farming possible.
E) it produced the world's first historian in Sima Qian.