According to the panama canal treaty signed by president carter, the united states would have
a)joint control of the canal by 2000.
b)give up all control of the canal by 2000.
c)have sole control over the canal after 2000.
d)send troops to protect the canal after 2000.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

these civilizations were located around fertile rivers, where they could produce an abundance of crops