What was the achievements of the Xia Dynasty?

Here is a little prompt to guide you...

Explanation:

The Xia dynasty is said to be the first to irrigate, produce cast bronze, and build a strong army. It used oracle bones and had a calendar. Xi Zhong is credited in legend with inventing a wheeled vehicle. He used a compass, square, and rule.

answer; /// i do believe that the correct answer is (a); a farming tribe that settled primarily along the mississippi and arkansas rivers;