Answer:
sorry am not really sure could you please give more detail?
Explanation:
The answer is C.
As a science website says, "Scientists think they know why the Ancestral Puebloans disappeared. The primary culprit, studies suggest, was a megadrought that would have made it impossible to grow enough food to feed the tens of thousands of people living in the region."
If you didn't know, drought represents the lack of rain.
The united states eventually stop supporting South Africa because : South Africa began taking arms and funds from the soviets.
Back then, United States was in the middle of cold war with the soviets union, and this showed that Soviet has implemented its influence in south africa
Hope this helps
