Slavery is what separated the north and the south. Its what caused the civil war. the north wanted to abolish slavery but the south needed it.
Well to start of with u can cross out a and c so now your left with b and c
So the answer is (D)
Answer: After the Cold War, the Truman Doctrine was formed. This promised smaller countries to get help from the United States if they were battling with communism. Another result was that the Soviet Union dissolved in 15 countries that were independent.
Explanation:
Many people died in the Cold War and left several countries poor.
The Nile River
The Tigris and Euphrates Rivers
Hope that helps :)