D. People in ancient China were cut off from others by geographic features.
Answer: The reason they fought was disagreements over land claims and the fur trade .
Explanation:
In the 1930s the central states region known as the Great Plains suffered from the longest and hardest droughts on record. Because of farming practices at the time, it resulted in erosion and loss of topsoil that became friable and powdery. The persistent heat and drought caused crops to fail leaving the fields exposed to wind erosion. High winds then generated the massive dust storms.
The correct answer is letter D:
<em>Severe droughts hit the Midwest, making the soil dry and more vulnerable to winds.</em>
