The Answer is
South Vietnam surrendered after Saigon fell.
There was not enough evidence that Johnson was guilty of "high crimes and misdemeanors." Johnson was supposed to be a rubber stamp for the Radical Republicans in Congress. He was expected to tow the party line and make the South suffer for the Civil War. When Johnson would not, his own party attempted to take him out.
The answer is the second option, that is -It was inland near a swampy area of a river
Jamestown's was located inland near a swampy area of river that contained mosquitoes that carried malaria. This disease killed many settlers. Not only this ,but the water they drank from the river was also contaminated with germs. These factors caused a lot of hardships to its settlers.