The correct answer is B) It left North Korea and South Korea divided at the 38th Parallel.
When North Korea passed into the South and tried to take it, the US intervened and fought Northerners back up. Then they decided to move up but this brought a lot of issues with China so the US and the UN decided to back off and go back to the status quo ante bellum borders which were at the 38th parallel. It's been the border ever since.
C. Long-distance shipping is most directly affected by the ruling in Gibbons v. Ogden, since the ruling stated that the same power to regulate commerce can be used to regulate navigation.
D. Fort Necessity
Attack stronger points to begin then go to the weaker points.
True is the answer
Your welcome
The answer is C. Hope this helped