Just compare a river map of West Africa to a map of West African kingdoms.
You can clearly see that all of these kingdoms form around the Niger River.
More support to this: None of these other rivers are even in Africa: The Thames is in England, the Indus is in Pakistan, and the Euphrates runs through the Middle East.
Answer:
Ming dynasty founder Emperor Taizu, or Zhu Yuanzhang, was born into poverty, and spent part of his youth wandering the country after his parents died following a series of natural disasters centered around the Yellow River.
The answer is C. Mexico believed Texas should remain a part of the independent government of Mexico.