When it comes to water, most countries in the middle east are self-sufficient because of rivers within their borders. self-sufficient because they have desalination plants. dependent on rivers that flow from outside their borders. dependent on rivers that flow within their borders.

When it comes to water, most countries in the Middle East are dependent on rivers that flow from outside their borders.
This is one of the reasons why there are so many wars within the Middle East area - because of insufficient water supplies. These rivers aren't located within a country, which means it has to delve into 'enemy territory' to get its water supply.

The answer is d.  the north had organized schools, whereas the south had few organized schools.