Which is a serious problem for south sudan?
a) controlling the oil field
b) using child soldiers from sudan
c) transporting oil through sudan
d) grazing rights on agricultural land

The correct answer should be A) controlling the oil field

Although Sudan is rich in oil, the industry is underdeveloped which makes it easy for various groups to compete over the oil fields. This causes a lot of issues and many of them are even based on ethnicity.

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.