Answer:
-they opened trade to south
The president has the power to veto the laws that Congress passes
C is the main one, but D is also very important (see The Voting Rights Act)
When humans first started to appear they had yet to figure out how to farm or fish. However they knew how to hunt animals using spears and such. They also were gatherers because they gathered berries. Later in the human race farming and fishing came into play. So I say A. Hunters......Gatherers.